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Dermpath-India Pathology of Trichoadenoma Dr Sampurna Roy MD 2022
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Trichoadenoma of Nikolowski
is a rare, benign, well differentiated, slowly growing tumour of the
hair follicle which was first described in 1958 by Nikolowski. Site: Face and buttocks. Clinically presents as a solitary papule/nodule. Microscopic features: Well circumscribed dermal tumour ; Multiple squamous islands most of which have a central cystic cavity showing epidermoid keratinization ; Features resemble multiple cross-section of infundibular portion of hair follicles. Variant: Verrucous trichoadenoma- Clinically resemble seborrheic keratosis ; Composed of small epidermoid cysts ; Abundant keratin on the epidermal surface.
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