Alopecia areata totalis: complete hair loss except for a few individual hairs; with greater enlargement, the preserved (hairless) follicles can be seen
Sebaceous nevus: clinical aspect of a sebaceous nevus in a few-month-old infant; only the slight plaque-like elevation of the hairless area indicates the actual diagnosis.
Alopecia postmenopausal, frontal, fibrosing: uniform receding of the frontal and temporal hairline. moderately pronounced ulerythema ophryogenes. keratosis follicularis on the extensor extremities.
Alopecia, post-menopausal, frontal, fibrosing: typical follicular inflammatory pattern (see frontal hairline). No symptoms. This results in a backward development of the forehead-hairline.
Alopecia areata (Grade 2-3): extensive loss of hair in the capillitium. at higher magnification, the preserved (hairless) follicles can be seen. preserved hair rings partly mark the grown alopecia foci. note individual re-grown pigment-free hairs
alopecia postmenopausal, fibrosing, uniform receding of the frontal and temporal hairline. encircling a flat erythema originating from follicles. arrows: discrete perifollicular redness. distinct ulerythema ophryogenes with complete destruction of the eyebrows (square). keratosis follicularis on the extensor extremities.
Postmenopausal fibrosing frontal alopecia: For several years now, the hairline has been continuously moving backwards. Clear ulerythema ophryogenes. Complete hairlessness of arms and legs (condition after keratosis pilaris) which has not been noticed before.
Alopecia marginalis: 45-year-old woman, who has been fixing the curly hair on the top of her head with 2 crossed hair clips for years. In the area of the hair clips now circumscribed hairless plaque with slight induration and coarsening of the skin surface. A histological examination was performed to exclude other causes.
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