title: Trichostasis spinulosa of the scalp mimicking Alopecia areata black dots.
abstract: Alopecia areata is a common autoimmune disorder that leads to nonscarring hair loss. Black dots, also called comedo-like cadaver hairs, can be found in almost 50% of alopecia areata patients and indicate disease activity. Trichostasis spinulosa is a follicular disorder resulting from the retention of numerous hairs surrounded by a keratinous sheath in dilated follicles. Trichostasis spinulosa is a relatively common but underdiagnosed disorder of hair follicles. Here, we describe a man with alopecia areata of the eyebrows, androgenetic alopecia and trichostasis spinulosa at the vertex and show how dermoscopy can be useful in distinguishing black dots from Trichostasis spinulosa lesions.
authors: Universidade Federal de Sergipe, Aracaju, SE, Brazil.
authors: Flavianne Sobral Cardoso
authors: FS
authors: Chagas
authors: Universidade de São Paulo, São Paulo, SP, Brazil.
authors: Aline
authors: A
authors: Donati
authors: Universidade de São Paulo, São Paulo, SP, Brazil.
authors: Isabella Ibrahim Doche
authors: II
authors: Soares
authors: Universidade de São Paulo, São Paulo, SP, Brazil.
authors: Neusa Sakai
authors: NS
authors: Valente
authors: Universidade de São Paulo, São Paulo, SP, Brazil.
authors: Ricardo
authors: R
authors: Romiti
mesh_terms: D000506:Alopecia Areata / Q000473:pathology*; D001706:Biopsy; D046169:Dermoscopy; D003937:Diagnosis, Differential; D006201:Hair Diseases / Q000473:pathology*; D006801:Humans; D007642:Keratosis / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011537:Pruritus / Q000473:pathology*; D012535:Scalp / Q000473:pathology; D012536:Scalp Dermatoses / Q000473:pathology*