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Image Number 2304 (Trichostasis spinulosa)

Hair excess

Diagnosis: Trichostasis spinulosa

Site: Cheek

Sex: M

Age: 35


Description: Bunch of hairs emerging from single hair follicles.

Submitted by: Nameer Al-Sudany

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Differential Diagnosis


Trichostasis spinulosa is a common disorder of the hair follicles that clinically gives the impression of blackheads but the follicles are filled with funnel-shaped, horny plugs wrthin which are bundles of vellus hairs that result from retention of telogen hairs, which are derived from a single hair matrix due to a hyperkeratosis of the follicular infundibulum, which leads to a partial obstruction of the follicular orifice and thus does not pemrit shedding of small telogen hairs.

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