Hypotrichosis

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Hypotrichosis Classification and external resources
ICD-9	704.09
DiseasesDB	14765
MeSH	D007039

Hypotrichosis is the state of having a less than normal amount of hair on the head or body. There are a number of causes, including hereditary hair follicle dysplasias, inflammation or infection of the hair follicles, neoplastic destruction, irradiation. Alopecia is a term that is used as an inexact synonym.

Hypotrichosis is a common feature of Hallermann-Streiff syndrome as well as others.

v • d • e Diseases of the skin and subcutaneous tissue (integumentary system) (L, 680-709) Infections Staphylococcus (Staphylococcal scalded skin syndrome, Impetigo, Boil, Carbuncle) - Cellulitis (Paronychia) - Acute lymphadenitis - Pilonidal cyst - Corynebacterium (Erythrasma) Bullous disorders Pemphigus - Pemphigoid (Bullous pemphigoid) - Dermatitis herpetiformis Dermatitis and eczema Atopic dermatitis - Seborrhoeic dermatitis (Dandruff, Cradle cap) - Diaper rash - Urushiol-induced contact dermatitis - Contact dermatitis - Erythroderma - Lichen simplex chronicus - Prurigo nodularis - Itch - Pruritus ani - Nummular dermatitis - Dyshidrosis - Pityriasis alba Papulosquamous disorders Psoriasis (Psoriatic arthritis) - Parapsoriasis (Pityriasis lichenoides et varioliformis acuta, Pityriasis lichenoides chronica, Lymphomatoid papulosis) - Pityriasis rosea - Lichen planus - Pityriasis rubra pilaris - Lichen nitidus Urticaria and erythema Urticaria (Dermatographic urticaria, Cholinergic urticaria) - Erythema (Erythema multiforme, Stevens-Johnson syndrome, Toxic epidermal necrolysis, Erythema nodosum, Erythema annulare centrifugum, Erythema marginatum) Radiation-related disorders Sunburn - Actinic keratosis - Polymorphous light eruption - Radiodermatitis - Erythema ab igne Disorders of skin appendages Nail Ingrown nail - Onychogryposis - Beau's lines - Yellow nail syndrome - Leukonychia Hair hair loss: Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis) - Androgenic alopecia - Hypotrichosis - Telogen effluvium - Traction alopecia - Lichen planopilaris - Trichorrhexis nodosa other follicular disorders: Hypertrichosis (Hirsutism) - Acne vulgaris - Rosacea (Perioral dermatitis, Rhinophyma) - follicular cysts (Epidermoid cyst, Sebaceous cyst, Steatocystoma multiplex) - Pseudofolliculitis barbae - Hidradenitis suppurativa - Folliculitis Sweat glands eccrine (Miliaria, Anhidrosis) - apocrine (Body odor, Chromhidrosis, Fox-Fordyce disease) Other pigmentation disorder (Vitiligo, Melasma, Freckle, Café au lait spot, Lentigo/Liver spot, Acanthosis nigricans) keratosis (Seborrheic keratosis, Callus) - other epidermal thickening (Ichthyosis acquisita, Palmoplantar keratoderma) skin ulcer (Pyoderma gangrenosum, Bedsore) atrophic (Lichen sclerosus, Acrodermatitis chronica atrophicans) necrobiosis (Granuloma annulare, Necrobiosis lipoidica) - other granuloma (Granuloma faciale, Pyogenic granuloma) vasculitis (Livedoid vasculitis, Erythema elevatum diutinum) Keloid - Systemic lupus erythematosus - Morphea - Calcinosis cutis - Sclerodactyly - Ainhum see also congenital (Q80-Q84, 757)