Pili multigemini

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Pili multigemini

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An extracted Pili Multigemini with three distinct hairs growing from the same source.

Pili multigemini is a malformation characterized by the presence of bifurcated or multiple divided hair matrices and papillae, giving rise to the formation of multiple hair shafts within the individual follicles.^[1]^:768^[2]

Another Pili Multigemini again with three distinct hairs growing from the same source.

References

^ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN 0-7216-2921-0.
^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 1-4160-2999-0.

Integumentary system (TA A16, TH H3.12, GA 10.1062)

Skin

Epidermis	Stratum corneum · Stratum lucidum · Stratum granulosum · Stratum spinosum · Stratum basale

Basement membrane zone	Basal keratinocyte · Lamina lucida · Lamina densa

Dermis	Papillary (Dermal papillae) · Reticular

Subcutaneous tissue

Panniculus/Pannus (Panniculus adiposus · Panniculus carnosus) · Stratum membranosum · Loose connective tissue · Superficial fascia

Adnexa

Skin glands

Sweat glands: Apocrine sweat gland · Eccrine sweat gland

Sebaceous

Hair

Root sheath	Outer root sheath · Inner root sheath (Henle's layer, Huxley's layer)

Hair shaft	Cuticle · Cortex · Medulla · Bulb with matrix cells · Hair follicle

Muscle	Arrector pili muscle

Pilosebaceous unit	Hair sebaceous gland

Nail

Nail matrix · Nail plate (Lunula) · Eponychium · Paronychium · Hyponychium

M: INT, SF, LCT

anat/phys/devp

noco(i/b/d/q/u/r/p/m/k/v/f)/cong/tumr(n/e/d), sysi/epon

proc, drug (D2/3/4/5/8/11)

M: SKA

anat/phys/devp

noco/cong/tumr, sysi/epon

proc, drug(D10)

Disorders of skin appendages (L60–L75, 703–706)

Nail

thickness: Onychogryphosis · Onychauxis

color: Beau's lines · Yellow nail syndrome · Leukonychia · Azure Lunula

shape: Koilonychia · Nail clubbing

behavior: Onychotillomania · Onychophagia

other: Ingrown nail · Anonychia

ungrouped: Paronychia (Acute paronychia, Chronic paronychia ) · Chevron nail · Congenital onychodysplasia of the index fingers · Green nails · Half and half nails · Hangnail · Hapalonychia · Hook nail · Lichen planus of the nails · Longitudinal erythronychia · Malalignment of the nail plate · Median nail dystrophy · Mees' lines · Melanonychia · Muehrcke's lines · Nail–patella syndrome · Onychoatrophy · Onychocryptosis · Onycholysis · Onychomadesis · Onychomatricoma · Onychomycosis · Onychophosis · Onychoptosis defluvium · Onychorrhexis · Onychoschizia · Platonychia · Pincer nails · Plummer's nail · Psoriatic nails · Pterygium inversum unguis · Pterygium unguis · Purpura of the nail bed · Racquet nail · Red lunulae · Shell nail syndrome · Splinter hemorrhage · Spotted lunulae · Staining of the nail plate · Stippled nails · Subungual hematoma · Terry's nails · Twenty-nail dystrophy

Hair

Hair loss/
Baldness

noncicatricial alopecia: Alopecia/Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis)
Androgenic alopecia (male-pattern baldness) · Hypotrichosis · Telogen effluvium · Traction alopecia · Lichen planopilaris · Trichorrhexis nodosa · Alopecia neoplastica · Anagen effluvium · Alopecia mucinosa

cicatricial alopecia: Pseudopelade of Brocq · Central centrifugal cicatricial alopecia · Pressure alopecia · Traumatic alopecia · Tumor alopecia · Hot comb alopecia · Perifolliculitis capitis abscedens et suffodiens · Graham-Little syndrome · Folliculitis decalvans

ungrouped: Triangular alopecia · Frontal fibrosing alopecia · Marie Unna hereditary hypotrichosis

Hypertrichosis

Hirsutism · Acquired generalized hypertrichosis · Generalized congenital hypertrichosis · Localized acquired hypertrichosis · Localized congenital hypertrichosis · Patterned acquired hypertrichosis · Prepubertal hypertrichosis · X-linked hypertrichosis

Acneiform eruption

Acne	Acne vulgaris · Acne conglobata · Acne miliaris necrotica · Tropical acne · Infantile acne/Neonatal acne · Excoriated acne · Acne fulminans · Acne medicamentosa (e.g., steroid acne) · Halogen acne (Iododerma, Bromoderma, Chloracne) · Oil acne · Tar acne · Acne cosmetica · Occupational acne · Acne aestivalis · Acne keloidalis nuchae · Acne mechanica · Acne with facial edema · Pomade acne · Acne necrotica · Blackhead · Lupus miliaris disseminatus faciei

Rosacea	Perioral dermatitis (Granulomatous perioral dermatitis) · Phymatous rosacea (Rhinophyma, Blepharophyma, Gnathophyma, Metophyma, Otophyma) · Papulopustular rosacea · Lupoid rosacea · Erythrotelangiectatic rosacea · Glandular rosacea · Gram-negative rosacea · Steroid rosacea · Ocular rosacea · Persistent edema of rosacea · Rosacea conglobata · variants (Periorificial dermatitis, Pyoderma faciale)

Ungrouped	Granulomatous facial dermatitis · Idiopathic facial aseptic granuloma · Periorbital dermatitis · SAPHO syndrome

Follicular cysts

Epidermoid cyst · Trichilemmal cyst · Sebaceous cyst · Steatocystoma (simplex, multiplex) · Milia

Inflammation

Folliculitis (Folliculitis nares perforans, Tufted folliculitis) · Pseudofolliculitis barbae
Hidradenitis (Hidradenitis suppurativa, Recurrent palmoplantar hidradenitis, Neutrophilic eccrine hidradenitis)

Ungrouped

Acrokeratosis paraneoplastica of Bazex · Acroosteolysis · Bubble hair deformity · Disseminate and recurrent infundibulofolliculitis · Erosive pustular dermatitis of the scalp · Erythromelanosis follicularis faciei et colli · Hair casts · Hair follicle nevus · Intermittent hair–follicle dystrophy · Keratosis pilaris atropicans · Kinking hair · Koenen's tumor · Lichen planopilaris · Lichen spinulosus · Loose anagen syndrome · Menkes kinky hair syndrome · Monilethrix · Parakeratosis pustulosa · Pili (Pili annulati · Pili bifurcati · Pili multigemini · Pili pseudoannulati · Pili torti) · Pityriasis amiantacea · Plica neuropathica · Poliosis · Rubinstein–Taybi syndrome · Setleis syndrome · Traumatic anserine folliculosis · Trichomegaly · Trichomycosis axillaris · Trichorrhexis (Trichorrhexis invaginata · Trichorrhexis nodosa) · Trichostasis spinulosa · Uncombable hair syndrome · Wooly hair · Wooly hair nevus

Sweat glands

Eccrine	Miliaria (Colloid milium • Miliaria crystalline • Miliaria profunda • Miliaria pustulosa • Miliaria rubra • Occlusion miliaria • Postmiliarial hypohidrosis), Granulosis rubra nasi, Ross’ syndrome, Anhidrosis, Hyperhidrosis (Generalized, Gustatory, Palmoplantar)

Apocrine	Body odor, Chromhidrosis, Fox–Fordyce disease

Sebaceous	Sebaceous hyperplasia

M: SKA

anat/phys/devp

noco/cong/tumr, sysi/epon

proc, drug(D10)

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Pili multigemini

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