from a large nevus sebaceus on her right parieto‐temporal scalp. Histologically, the tumors
corresponded to a sebaceoma with carcinomatous change, a poroma and a trichoblastoma.
Immunohistochemical staining of the sebaceous tumor with p53 showed strong within the
areas of carcinomatous change, while there was negative to weak staining within the
sebaceoma‐like areas. A discussion on the potential secondary neoplasms from a nevus …