Hair Restoration Terminology, Defined

One arrives at the hair restoration conversation expecting a single vocabulary, and the Korean corridor — and this matters — does not offer one. The lexicon spans surgical, medical, regenerative, and trichoscopic registers; each sits on its own evidentiary shelf, addresses its own indication, and asks its own questions of the patient. What follows is a categorical glossary of fifty terms a careful patient is likely to encounter in a Cheongdam or Apgujeong trichology consult, read as the older corridor reads them — the definitions calibrated, the cross-references drawn, the regulatory and evidentiary register articulated where it matters. 先睇清楚個用語，再講療程 — read the terminology first, the protocol after, as the corridor's phrasing has it.

A-Z index

The fifty terms are grouped alphabetically below; the index lets a reader jump to the relevant register. Alopecia areata · Anagen · Androgenetic alopecia · ARTAS · Beard graft · Body hair transplant · Cicatricial alopecia · Crown · Catagen · Donor area · DHT · Dutasteride · Effluvium · Exosome · Finasteride · Folliculitis · FUE · FUT · Graft · Hairline design · Hair density · Hair shaft · Hair transplant · Hypertrichosis · Implanter pen · Ketoconazole · Low-level laser therapy · Microneedling · Miniaturisation · Minoxidil · Norwood scale · Pattern hair loss · PRP · Recipient site · Recession · Scalp micropigmentation · Sapphire blade · Seborrheic dermatitis · Shock loss · Stem cell scalp injection · Telogen · Telogen effluvium · Trichoscopy · Topical finasteride · Traction alopecia · Trichotillomania · Vellus hair · Vertex · Wharton's jelly · 5-alpha-reductase.

A

The A-terms span the autoimmune register, the cyclical biology of the follicle, the genetic taxonomy that organises most of the consult-room conversation, and the robotic surgical platform a patient is likeliest to encounter at the Cheongdam end of the corridor.

Alopecia areata

An autoimmune patterning of hair loss in which the follicle is attacked by the patient's own immune register — most commonly producing well-defined circular patches on the scalp, though the diffuse and the totalis-and-universalis presentations sit within the same diagnostic family. The condition is meaningfully distinct from androgenetic alopecia; the trichology register, the workup, and the therapeutic arc all depart from the pattern-loss corridor. A patient with patchy non-scarring loss should expect the Cheongdam consult to articulate the autoimmune framing first — and the surgical register, where it sits at all, to be deferred until the inflammatory arc has stabilised. 斑禿同男士脫髮係兩回事 — areata and pattern loss are not the same conversation. See also: cicatricial alopecia, telogen effluvium, trichoscopy.

Anagen

The active growth phase of the hair follicle — the long, productive arc during which the matrix cells divide, the shaft elongates, and the pigment is laid down. Anagen runs two to seven years on the scalp under healthy conditions; the duration is genetically calibrated and is the variable that organises terminal length. Pattern hair loss shortens the anagen window and lengthens the resting register; the miniaturised follicle is, in the trichoscopy frame, an anagen-shortened follicle. A patient at consult should expect the anagen-catagen-telogen cycle to be articulated as the framework that organises the therapeutic register. See also: catagen, telogen, miniaturisation.

Androgenetic alopecia

The genetically patterned, hormonally mediated hair loss that organises most of the male and a meaningful proportion of the female consult-room conversation — driven, in the prevailing model, by the conversion of testosterone to dihydrotestosterone under 5-alpha-reductase and the genetically calibrated sensitivity of frontal and vertex follicles to that signal. The Norwood scale categorises the male presentation; the Ludwig and Sinclair scales categorise the female register. A patient at the Cheongdam consult should expect the genetic-and-hormonal framing to be articulated first, the medical register to be discussed before the surgical, and the timeline to be calibrated honestly. See also: DHT, 5-alpha-reductase, Norwood scale, miniaturisation.

ARTAS

A robotic FUE harvest platform — image-guided, algorithmically calibrated — that automates the punch-extraction step of follicular unit extraction under the surgeon's supervisory register. The ARTAS register sits at the technologically forward end of the Korean corridor; a patient is likeliest to encounter it at the larger Cheongdam transplant practices. The platform is a tool, not a protocol; the consult-room reading should articulate the surgeon's role as primary and the robot's role as an instrument calibrated to the individual donor architecture. The marker is the surgeon's case volume, not the platform's marketing copy. See also: FUE, donor area, graft.

B

The B-terms map to the donor-extension register — the body hair and beard sources a careful patient is likeliest to encounter when scalp-donor density sits below the threshold for a primary harvest.

Beard graft

A follicular unit harvested from the submental beard region for transplantation to the scalp — most commonly used as a donor extension in the Norwood VI-VII patient, where scalp-donor density sits below the threshold for the planned recipient yield. The beard graft has a distinct calibre, growth cadence, and pigment register; the experienced Cheongdam practices articulate the differential character honestly and reserve the beard register for the supplementary role rather than the primary harvest. The recipient-site distribution requires its own protocol. See also: body hair transplant, donor area, FUE.

Body hair transplant

The harvest of follicular units from extra-scalp body sites — chest, abdomen, beard, occasionally limbs — for transplantation to the scalp under the FUE register. The body-hair register is reserved, in the conservative consult room, for the donor-depleted patient; the calibre, the anagen window, and the long-term yield differ meaningfully from the scalp-occipital donor and the patient's expectations should be calibrated to that register. The technique is procedurally demanding; surgeon experience is the marker. See also: beard graft, FUE, donor area.

C

The C-terms span the scarring register, the regional anatomy of the vertex, and the brief regression phase that closes the follicle's productive arc.

Cicatricial alopecia

The scarring family of hair loss — lichen planopilaris, frontal fibrosing alopecia, central centrifugal cicatricial alopecia, dissecting cellulitis among others — in which the follicular unit is destroyed and replaced by fibrotic tissue. The scarring register is meaningfully distinct from the non-scarring; the trichoscopy presentation differs, the workup includes biopsy in many cases, and the surgical register is contraindicated until the inflammatory arc has stabilised across an extended observation window. A patient with scarring loss should expect the consult to articulate the dermatological-medical register first and the transplant question to be deferred. See also: alopecia areata, trichoscopy, folliculitis.

Crown

The vertex region of the scalp — the whorl-centred zone at the posterior summit — and one of the two regions, alongside the frontal hairline, that organise the consult-room conversation about pattern hair loss. The crown sits at a particular evidentiary register; the long-term progression is more difficult to predict than the frontal arc, the donor-density calculation is more demanding, and the surgical decision asks more of the patient's age and family-history register. The Cheongdam corridor reserves crown reconstruction for the carefully selected case. See also: vertex, Norwood scale, hairline design.

Catagen

The brief regression phase of the hair cycle — two to three weeks — during which the follicle contracts, the matrix cells stop dividing, and the shaft prepares for the resting telogen register. Catagen is the shortest of the three phases and is, under healthy conditions, encountered in only a small fraction of the follicular population at any moment. A meaningfully elevated catagen percentage in the trichoscopy reading flags a disturbance that warrants further workup. See also: anagen, telogen, trichoscopy.

D

The D-terms are the gravitational centre of the medical conversation — the donor-area architecture, the hormonal driver, and the dual-inhibitor pharmaceutical register.

Donor area

The occipital and inferior parietal scalp region — relatively spared by the androgenetic register in most patients — from which follicular units are harvested for transplantation. The donor-area architecture organises the entire surgical conversation; the Cheongdam-trained surgeon reads donor density, calibre, and the patient's projected long-term loss before articulating a graft-yield range. A patient at consult should expect the donor reading to be articulated honestly — the maximum lifetime yield is finite, and the conservative register reserves donor capacity against the patient's progressive loss. See also: FUE, FUT, graft.

DHT

Dihydrotestosterone — the androgenic metabolite, formed from testosterone under 5-alpha-reductase, that drives the genetically calibrated miniaturisation of frontal and vertex follicles in the androgenetic register. DHT is the molecular target of the finasteride and dutasteride register; the medical conversation about pattern hair loss is, at its core, a conversation about modulating DHT exposure at the follicular level. A patient at consult should expect the DHT framing to be articulated as the medical primary, with the surgical register positioned downstream of the medical stabilisation. See also: 5-alpha-reductase, finasteride, dutasteride, androgenetic alopecia.

Dutasteride

A dual 5-alpha-reductase inhibitor — suppressing both type I and type II isoenzymes — and one of the pharmaceutical registers used off-label and on-label in different jurisdictions for androgenetic alopecia. The Korean corridor encounters dutasteride at meaningful prescription frequency; the Cheongdam consult will articulate the dual-inhibition register, the side-effect profile, and the differential evidence base versus finasteride. The reading should be physician-led; self-prescription is contraindicated. See also: finasteride, 5-alpha-reductase, DHT.

E

The E-terms span the diffuse-shedding category and the regenerative-medicine adjunct that has entered the conservative trichology consult on a calibrated register.

Effluvium

A category of diffuse, non-patterned hair shedding — most commonly the telogen and anagen subtypes — in which the loss is encountered across the scalp rather than along the genetic pattern lines. The effluvium register asks for a different workup than the androgenetic conversation; the Cheongdam consult will articulate thyroid panel, ferritin, and the recent stress-illness-medication arc before reaching for the trichoscopy frame. The shedding is, in most subtypes, reversible. See also: telogen effluvium, trichoscopy, anagen.

Exosome

An extracellular vesicle — 30 to 150 nanometres in diameter — released by mesenchymal cells into the surrounding medium and carrying a payload of proteins, lipids, and RNA species under investigation as a regenerative signalling adjunct. The exosome register has entered the Korean trichology adjunct conversation; a patient at the Cheongdam consult will encounter exosome scalp protocols at the conservative end articulated as adjunct rather than as standalone therapy, with the Ministry of Food and Drug Safety's regulatory framing read honestly. The evidence base is developing, not settled. See also: stem cell scalp injection, PRP, Wharton's jelly.

F

The F-terms organise the central pharmaceutical register, the inflammatory complication, and the two surgical harvest techniques that bound the transplant conversation.

Finasteride

A type II 5-alpha-reductase inhibitor, originally developed for benign prostatic hyperplasia, used at a one-milligram daily dose for androgenetic alopecia in the male register. Finasteride sits at the centre of the medical conversation about pattern hair loss; the Cheongdam consult will articulate the mechanism, the timeline (six to twelve months for a meaningful reading), the side-effect register, and the post-finasteride syndrome literature honestly. The medication is physician-prescribed; self-administration without consult is contraindicated. See also: dutasteride, DHT, topical finasteride.

Folliculitis

An inflammation of the follicular unit — bacterial, fungal, or sterile — that may present in the post-transplant register, in the seborrheic dermatitis arc, or in the dissecting-cellulitis cicatricial family. The post-transplant folliculitis is, in most cases, self-limiting; the recurrent or scarring register asks for a dermatological reading and may shift the conversation toward the cicatricial taxonomy. A patient with persistent inflammatory papules should expect the consult to articulate the differential before reaching for an antibiotic register. See also: cicatricial alopecia, seborrheic dermatitis.

FUE

Follicular unit extraction — the surgical harvest technique in which individual follicular units are extracted from the donor area by circumferential punch and transferred to the recipient site. The FUE register has organised the Korean corridor for over a decade; the technique is donor-area-discrete, recovery-favourable, and procedurally demanding on the surgeon. A patient at the Cheongdam consult should expect the FUE-FUT decision to be articulated against donor architecture, planned graft yield, and the long-term progression rather than against marketing-copy preference. See also: FUT, donor area, ARTAS, sapphire blade.

FUT

Follicular unit transplantation — the strip-harvest technique in which a longitudinal strip of donor scalp is excised under closure and the follicular units are dissected from the strip under stereoscopic microscopy before recipient transfer. The FUT register is procedurally older than FUE; the technique offers a meaningfully higher single-session graft yield and a different donor-scar register. The Korean corridor uses FUT selectively, most commonly in the high-yield-required Norwood V-VI patient. See also: FUE, donor area, graft.

G

The G-terms span the unit of surgical accounting and the donor reading.

Graft

A follicular unit — typically containing one to four hairs — harvested from the donor area and transferred to the recipient site as the unit of surgical accounting. The graft yield is the central number in the consult-room conversation; the experienced Cheongdam surgeon will articulate the yield as a range calibrated to donor density, recipient-site geography, and the patient's planned hairline aesthetic. A patient should expect the graft count to be discussed honestly, with the long-term donor reserve articulated against the projected progression. See also: FUE, FUT, donor area, hair density.

H

The H-terms organise the aesthetic conversation — the hairline geometry, the density reading, and the transplant taxonomy that the surgical register sits inside.

Hairline design

The geometric and aesthetic protocol under which the recipient-site contour is drawn — the frontal-temporal point, the mid-frontal apex, the temple-recession reading — and articulated against the patient's facial proportions, age, and projected progression. Hairline design is the surgeon's signature register; the Cheongdam corridor reads age-appropriate, progression-calibrated, and ethnically-resonant lines as the markers of the conservative practice. The over-aggressive low hairline is the canonical anti-pattern. See also: graft, recession, recipient site.

Hair density

The number of follicular units or terminal hairs per square centimetre — the quantitative reading that organises both the donor harvest calculation and the recipient-site coverage protocol. Native scalp density runs sixty to one hundred follicular units per square centimetre in most patients; the post-transplant recipient density is calibrated below the native register against the donor reserve. A patient at consult should expect the density numbers to be articulated as a calibrated range rather than as a maximalist target. See also: graft, donor area, miniaturisation.

Hair shaft

The keratinised, non-living portion of the hair fibre — the structure that emerges from the follicle and contributes the visible aesthetic register of length, calibre, and pigment. The hair shaft is the surface phenomenon; the regenerative and pharmaceutical conversation addresses, in most cases, the follicle rather than the shaft. The shaft register is encountered in the conditioner, masking, and post-transplant care arc. See also: vellus hair, miniaturisation.

Hair transplant

The surgical relocation of follicular units from the donor area to the recipient site under FUE or FUT — the procedural register that organises the structural conversation about pattern hair loss. The transplant is a redistribution rather than a multiplication of follicles; the patient's lifetime donor reserve is finite and should be calibrated against projected progression in the consult-room reading. The conservative Cheongdam practice articulates the medical-stabilisation register before the surgical conversation. See also: FUE, FUT, donor area, graft.

Hypertrichosis

An excess of terminal hair growth in non-androgen-dependent regions — distinct from hirsutism, which addresses the androgen-dependent female register. Hypertrichosis is encountered in the trichology consult most often as a side-effect register of the topical minoxidil arc, where vellus-to-terminal conversion at the application periphery may produce unwanted facial growth. A patient considering minoxidil should expect the side-effect register to be articulated honestly. See also: minoxidil, vellus hair.

I

The I-term sits at the surgical-instrument register that organises the recipient-site placement arc.

Implanter pen

A surgical instrument — most commonly the Choi or Lion variant in the Korean corridor — that allows simultaneous recipient-site creation and graft placement under the surgeon's controlled depth and angle register. The implanter pen technique sits at the technically refined end of the Korean transplant corridor; the marker is the surgeon's case volume and the audit-room calibration of angle, depth, and direction rather than the instrument's marketing copy. The tool is calibrated to the surgeon. See also: FUE, recipient site, graft.

K

The K-term anchors the topical-antifungal adjunct register.

Ketoconazole

A topical antifungal — most commonly encountered as a two-percent shampoo — used in the trichology adjunct register for its seborrheic-dermatitis indication and for a hypothesised mild anti-androgen action at the scalp surface. The Cheongdam consult will articulate ketoconazole as a calibrated adjunct rather than as a primary register; the evidence base is supportive rather than definitive. The shampoo is generally safe at the standard frequency. See also: seborrheic dermatitis, minoxidil, finasteride.

L

The L-term sits at the device-based adjunct end of the medical register.

Low-level laser therapy

The application of red-spectrum laser or LED light at sub-thermal fluences to the scalp — under home-device caps and combs or in-office panels — as a putative photobiomodulation adjunct in androgenetic alopecia. The low-level laser register sits at the device end of the trichology adjunct conversation; the evidence base is mixed-supportive at the conservative reading, and the Cheongdam consult will articulate the register as adjunct rather than as standalone. The patient compliance reading matters. See also: minoxidil, finasteride, microneedling.

M

The M-terms span the procedural and pharmaceutical adjuncts, the central biological mechanism of pattern loss, and the topical primary that has organised the medical register since the eighties.

Microneedling

The controlled, repeated mechanical puncture of the scalp surface — under a roller or pen device at calibrated needle depth — used in the trichology adjunct register, often in combination with topical minoxidil or PRP, to augment follicular response. The microneedling register sits in the supportive-evidence frame; the Cheongdam consult will articulate frequency, depth, and the post-procedural arc honestly. The home-device register is best calibrated under physician guidance rather than via marketing copy. See also: minoxidil, PRP, low-level laser therapy.

Miniaturisation

The progressive reduction in follicular calibre — terminal to vellus — that defines the histological and trichoscopic signature of androgenetic alopecia. Miniaturisation is the mechanism the medical register addresses; the finasteride-and-minoxidil arc aims to halt or reverse the trajectory at the level of the follicle rather than at the level of the shaft. A patient at the Cheongdam trichoscopy reading should expect miniaturisation to be articulated as the diagnostic marker. See also: androgenetic alopecia, vellus hair, trichoscopy.

Minoxidil

A topical (and, off-label, oral) vasodilator — originally developed as an antihypertensive — that prolongs anagen and increases follicular calibre in the androgenetic register at the standard topical concentrations of two and five percent. Minoxidil sits at the centre of the topical conversation; the Cheongdam consult will articulate the timeline (four to six months for a meaningful reading), the shedding-on-initiation register, and the lifelong-application framing honestly. The oral minoxidil register has entered the conversation at the conservative end of the Korean corridor under physician supervision. See also: finasteride, microneedling, hypertrichosis.

N

The N-term anchors the categorical taxonomy that organises the male pattern-loss conversation.

Norwood scale

The Hamilton-Norwood seven-stage classification of male pattern hair loss — from the type I unaffected through the type VII near-complete loss with retained occipital horseshoe — that organises the surgical-planning conversation in the male register. The Cheongdam consult will articulate the patient's current Norwood stage and the projected future stage as paired readings; the surgical decision is calibrated against the projected rather than the present register. The scale is categorical; the within-stage variation matters. See also: androgenetic alopecia, donor area, hair transplant.

P

The P-terms organise the broader taxonomy and the autologous-blood adjunct that has entered the trichology consult on a calibrated register.

Pattern hair loss

The umbrella term for genetically calibrated, hormonally mediated, regionally patterned hair loss — the male and female presentations together — that organises most of the trichology consult-room conversation. Pattern hair loss is meaningfully distinct from the autoimmune, the diffuse, and the scarring registers; the diagnostic discipline at the Cheongdam consult turns on this differential. The medical register is the primary conversation, with the surgical register positioned downstream. See also: androgenetic alopecia, Norwood scale, miniaturisation.

PRP

Platelet-rich plasma — the autologous-blood preparation in which platelets are concentrated by centrifugation and re-administered to the scalp under intradermal injection as a trichology adjunct. The PRP register has entered the Korean corridor at meaningful adoption; the Cheongdam consult will articulate the protocol, the typical three-injection induction arc, and the maintenance register honestly, and will read PRP as adjunct rather than as standalone. The evidence base is supportive at the conservative reading. See also: stem cell scalp injection, exosome, microneedling.

R

The R-terms map to the recipient anatomy and the temporal-recession reading that organises the hairline conversation.

Recipient site

The scalp region — typically the frontal hairline, mid-frontal zone, and crown — into which harvested follicular units are placed under the surgeon's incision-and-implanter register. The recipient-site protocol governs angle, depth, direction, and density; the Cheongdam-trained surgeon's reading of the recipient register is the central determinant of the post-transplant aesthetic outcome. A patient at consult should expect the recipient-site protocol to be articulated honestly against the donor reading. See also: graft, hairline design, implanter pen.

Recession

The temporal-frontal retreat of the hairline that opens the Norwood stage II and III conversation — typically symmetrical, sometimes asymmetrical, and most commonly the patient's first encountered marker of pattern loss. The recession register asks for the medical-stabilisation conversation first; the surgical decision is calibrated against the projected rather than the present recession arc. A patient should expect the consult to articulate the progression risk honestly. See also: Norwood scale, hairline design, androgenetic alopecia.

S

The S-terms span the cosmetic-tattoo adjunct, the surgical-blade refinement, the inflammatory dermatosis, the post-transplant phenomenon, and the regenerative-medicine register that has entered the conservative trichology consult under a calibrated framing.

Scalp micropigmentation

A cosmetic tattoo register — using calibrated pigment dots across the scalp — that creates the optical impression of a closely shaved follicular density. Scalp micropigmentation is encountered, in the Korean corridor, both as a standalone register for the donor-depleted patient and as an adjunct to the transplant arc for density-impression augmentation. The Cheongdam consult will articulate the technique honestly as cosmetic rather than restorative. See also: hair transplant, hair density.

Sapphire blade

A sapphire-tipped scalpel used for recipient-site incision in the FUE arc — at finer calibre than steel — and articulated in the Korean corridor as a refinement on the recipient-incision protocol. The sapphire-blade register sits in the technical-refinement frame; the marker is the surgeon's calibration rather than the instrument's marketing copy. A patient should not over-weigh the blade choice against the surgeon's case volume. See also: FUE, recipient site, implanter pen.

Seborrheic dermatitis

An inflammatory dermatosis of the scalp — characterised by erythema, scale, and pruritus — that may intersect the trichology register both as a comorbidity and as a contributor to the diffuse-shedding conversation. The Cheongdam consult will articulate the seborrheic register as a treatable comorbidity, often via the ketoconazole adjunct, before reading the trichoscopy under stabilised conditions. The condition is chronic-relapsing. See also: ketoconazole, folliculitis, effluvium.

Shock loss

A telogen-effluvium-pattern shedding of the native hair surrounding the recipient site in the weeks following a transplant — encountered most commonly at the four-to-eight-week post-procedural window and, in most cases, reversible across the subsequent four-to-six-month register. The Cheongdam consult will articulate shock loss as an expected though variable post-transplant phenomenon and will calibrate the patient's expectation accordingly. The marker is honest pre-procedural framing. See also: hair transplant, telogen effluvium.

Stem cell scalp injection

An autologous or allogeneic cellular injection register — most commonly using adipose-derived stem cells, umbilical-cord-derived stem cells, or stem-cell-derived exosomes — administered intradermally to the scalp as a trichology adjunct under the Ministry of Food and Drug Safety's cellular-therapy framework. The Cheongdam consult will articulate the register honestly as adjunct rather than as standalone, with the regulatory framing read cleanly and the evidence base presented as developing rather than settled. See also: exosome, PRP, Wharton's jelly.

T

The T-terms span the resting phase of the cycle, the diffuse-shedding subtype, the diagnostic-imaging register, the topical pharmaceutical, and the mechanical and behavioural categories that round out the consult conversation.

Telogen

The resting phase of the hair cycle — typically two to four months — during which the follicle is quiescent and the shaft is retained until shed at the next anagen onset. Telogen accounts for ten to fifteen percent of the follicular population at any healthy moment; a meaningfully elevated telogen percentage flags the effluvium register. See also: anagen, catagen, telogen effluvium.

Telogen effluvium

A diffuse, non-patterned shedding triggered by a stressor — childbirth, fever, surgery, severe nutritional deficit, thyroid disturbance, medication change — that synchronises a meaningful fraction of the follicular population into telogen and produces the shedding three to four months downstream. The condition is, in most subtypes, reversible across the four-to-six-month window once the trigger has resolved. The Cheongdam consult will articulate the workup register honestly before reaching for the androgenetic frame. See also: effluvium, telogen, trichoscopy.

Trichoscopy

The dermoscopic examination of the scalp and follicular openings — typically at twenty- to seventy-times magnification — that organises the differential between androgenetic, telogen-effluvium, alopecia-areata, and cicatricial registers. Trichoscopy is the diagnostic discipline of the Cheongdam trichology consult; a patient should expect the practice to articulate findings — calibre variation, peripilar sign, yellow dots, exclamation hairs — as the basis for the therapeutic conversation. See also: miniaturisation, alopecia areata, cicatricial alopecia.

Topical finasteride

A topical formulation of finasteride — under various concentration and vehicle protocols — that aims to deliver the 5-alpha-reductase-inhibition register at the scalp surface with a meaningfully reduced systemic-absorption profile relative to the oral arc. The topical register has entered the Korean corridor under compounded prescription; the Cheongdam consult will articulate the comparative evidence honestly and read the topical as physician-prescribed rather than as over-the-counter. See also: finasteride, dutasteride, DHT.

Traction alopecia

A mechanical hair-loss register — driven by chronic tension on the follicle from styling practices, hair extensions, tight braiding, or severe ponytail discipline — that produces a frontal-temporal recession most commonly distinguishable from androgenetic alopecia by history. The Cheongdam consult will articulate the behavioural-modification register first; the surgical conversation is reserved for the post-stabilisation case. See also: androgenetic alopecia, recession.

Trichotillomania

A behavioural register — within the obsessive-compulsive-spectrum family — characterised by recurrent pulling of one's own hair and the resulting irregular, asymmetrical patches of loss. The diagnostic discipline turns on history, scalp-pattern reading, and the absence of the inflammatory and androgenetic markers; the Cheongdam consult will articulate the psychiatric-register referral as primary, with the trichology adjunct positioned downstream. See also: alopecia areata, cicatricial alopecia.

V

The V-terms map to the miniaturised-fibre category and the regional anatomy of the crown.

Vellus hair

The fine, short, lightly pigmented hair fibre — typically under thirty microns in calibre and under two centimetres in length — that represents the regressed end of the terminal-vellus continuum and the trichoscopic signature of androgenetic miniaturisation. A patient at the Cheongdam trichoscopy will expect the vellus reading to be articulated as the diagnostic marker of the pattern register. See also: miniaturisation, hair shaft, androgenetic alopecia.

Vertex

The whorl-centred posterior summit of the scalp — synonymous, in most consult-room usage, with the crown — and one of the two regions, alongside the frontal hairline, that organise the pattern-loss conversation. The vertex register asks for a more cautious surgical reading than the frontal arc; the projected progression and the donor-reserve calculation are more demanding. See also: crown, Norwood scale, donor area.

W

The W-term anchors the umbilical-cord-derived cellular-source register encountered in the regenerative-adjunct conversation.

Wharton's jelly

The mucoid connective tissue of the umbilical cord — and, under registered tissue-bank discipline, a source of allogeneic mesenchymal stem cells used in the cellular-therapy register including, on a calibrated basis, the trichology-adjunct conversation. The Wharton's jelly register sits on a tighter regulatory footing under the Ministry of Food and Drug Safety's cellular-therapy framework than the autologous register; a patient at the Cheongdam consult should expect the source, donor screening, and tissue-bank standing to be articulated honestly. See also: stem cell scalp injection, exosome, allogeneic.

5

The numerical entry sits at the enzymatic register that organises the male pattern-loss medical conversation.

5-alpha-reductase

The enzyme — present in type I and type II isoforms across the skin, scalp, prostate, and liver — that converts testosterone to dihydrotestosterone and sits at the molecular centre of the androgenetic-alopecia mechanism. The pharmaceutical register addresses 5-alpha-reductase directly; finasteride inhibits type II, and dutasteride inhibits both type I and type II. A patient at the Cheongdam consult should expect the enzyme to be articulated as the mechanistic anchor of the medical conversation. See also: DHT, finasteride, dutasteride, androgenetic alopecia.

Frequently asked questions

How is androgenetic alopecia distinguished from telogen effluvium at the consult?

The differential turns on pattern, timeline, and trichoscopy. Androgenetic alopecia presents along the frontal-vertex pattern lines with miniaturisation as the trichoscopic signature; telogen effluvium presents diffusely across the scalp, typically three to four months after a defined stressor, with calibre uniformity preserved. The Cheongdam consult reads both registers honestly and orders the workup before reaching for the medical arc.

Why does the conservative consult discuss medical stabilisation before the surgical conversation?

Because the transplant is a redistribution rather than a multiplication of follicles. The patient's lifetime donor reserve is finite; the projected progression of pattern loss continues regardless of the surgical procedure. Stabilising the medical register first — via finasteride, dutasteride, minoxidil, or the relevant adjuncts — preserves the native follicular population and calibrates the surgical decision against a meaningful baseline.

What distinguishes FUE from FUT in the consult-room conversation?

FUE harvests individual follicular units by circumferential punch, leaving discrete dot-pattern donor scars and a recovery-favourable register. FUT harvests a longitudinal donor strip under closure, leaves a linear scar, and offers a meaningfully higher single-session graft yield. The Cheongdam consult calibrates the FUE-FUT decision against donor architecture, planned graft yield, and the patient's long-term progression rather than against marketing-copy preference.

How should a patient read the regenerative-medicine adjuncts — PRP, exosome, stem cell scalp injection?

As adjunct rather than as standalone. The Korean corridor encounters all three at meaningful adoption; the conservative Cheongdam practice articulates each on its own evidentiary register, reads the Ministry of Food and Drug Safety's regulatory framing honestly, and positions the adjunct downstream of the medical primary. The evidence base is supportive at the conservative reading and developing rather than settled.

What is shock loss, and how is the patient's expectation calibrated against it?

Shock loss is a telogen-effluvium-pattern shedding of native hair surrounding the recipient site in the weeks after a transplant — most commonly at the four-to-eight-week window — and, in most cases, reversible across the subsequent four-to-six-month register. The Cheongdam consult articulates shock loss as an expected though variable post-procedural phenomenon and calibrates the patient's expectation honestly before the procedure rather than after.

How does the Norwood scale function in the surgical-planning conversation?

The scale categorises male pattern loss across seven stages — type I unaffected through type VII near-complete with retained occipital horseshoe — and organises the donor-reading and graft-yield calculation. The Cheongdam consult articulates the patient's current Norwood stage and the projected future stage as paired readings; the surgical decision calibrates against the projected register rather than the present, with the within-stage variation read carefully.

What does trichoscopy contribute to the diagnostic register?

Trichoscopy is the dermoscopic examination of the scalp and follicular openings at twenty- to seventy-times magnification. It organises the differential between androgenetic, telogen-effluvium, alopecia-areata, and cicatricial registers via calibre variation, the peripilar sign, yellow dots, exclamation hairs, and the broader follicular-opening reading. The Cheongdam practice articulates trichoscopy findings as the diagnostic basis for the therapeutic conversation rather than as a marketing register.