Trichostasis spinulosa misdiagnosed as alopecia areata

Trichostasis spinulosa: An entity with cosmetic concern

“…TS is described in association with space-occupying lesions that constrict follicle infundibulae by tumor cells or tumor-related fibrosis, [11] such as melanocytic nevi, [12] collagenoma, [13] seborrheic keratosis, [14] syringomas, [14] follicular sebaceomas (trichofolliculomas), or nodular basal cell carcinomas. [15,16]…”

“…[21] e pruritic type seen in young adults is the second variant and is characterized by widespread distribution, extrafacial involvement, and in association with other follicular hyperkeratotic disorders, chronic renal failure, and benign cutaneous tumors. [15,21,22] Uncommon presentations include involvement of scalp mimicking black dots of alopecia areata, [11,23] involvement of axilla, [24] lower eyelid, [7] nevoid pattern [25] , and generalized distribution in a case with chronic renal failure. [22]…”

Two new dermoscopic features of trichostasis spinulosa and its reflectance confocal microscopic appearance

“…Trichostasis spinulosa (TS) is a relatively common yet unrecognized follicular disorder characterized by the retention of numerous vellus hairs surrounded by a hyperkeratotic dilated hair follicle [ 1 ]. The main dermoscopic structures of TS have been identified previously [ 2 ].…”