Triphasic Malignant and Benign Transformation within a Nevus Sebaceus: Concomitant Basal Cell Carcinoma, Squamous Cell Carcinoma, and Apocrine Adenoma
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Keywords
nevus sebaceus, Basal cell carcinoma, squamous cell carcinoma, apocrine adenoma, scalp neoplasm, triphasic transformation
Abstract
Nevus sebaceus is a congenital hamartoma that may undergo secondary neoplastic changes, most commonly benign adnexal tumors. Malignant transformation is rare, and the simultaneous occurrence of multiple neoplastic entities is exceedingly uncommon. We report a rare case of a 49-year-old man with a nevus sebaceus of the scalp harboring basal cell carcinoma, squamous cell carcinoma, and an adjacent apocrine adenoma, representing a rare triphasic transformation.
References
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