By Gary M. White, MD
The trichoblastic fibroma, also known as trichoblastoma, small nodular type, is a rare benign cutaneous adnexal tumor that shows trichogenic (follicular) differentiation.
A slow growing, asymptomatic, skin-colored to yellowish, firm plaque on the face, most commonly the chin, nose, cheek or lip is characteristic. The most common clinical diagnosis is BCC. A trichoblastic carcinoma can rarely develop after many years.
Given the rarity of this entity and the potential confusion with other tumors, surgical excision is appropriate.
A solitary asymptomatic tumor on the knee. Int J Trichol 2015;7:136-7
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