Abstract

Clinically, folliculosebaceous cystic hamartoma (FSCH)is uncommon and lacks distinct features. It often manifests as asymptomatic, skin-colored papules or nodules mostly distributed on the face. Histopathologically, it is a kind of hamartoma of skin appendages mainly characterized by the hyperplasia of folliculosebaceous units and mesenchymal tissues. The differential diagnosis mainly includes sebaceous trichofolliculoma and dermoid cyst. Its immunohistochemical manifestations are unspecific and associated with epithelial and non-epithelial component within the hamartoma. This paper presents an update on the knowledge about clinical and immunohistochemical manifestation of, diagnostic criteria and treatment for FSCH. Key words: Hamartoma; Epidermal cyst; Hair follicle; Sebaceous glands

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