FREDERIC B.ASKINMDWILLIAM H.WESTRAMD
Nevus sebaceus was first described by Jadassohn1 in 1895. It is a congenital hamartomatous lesion that is important to diagnose because of its possibility for malignant degeneration. It presents at or shortly after birth as a solitary waxy plaque and is usually yellow or brown. It is often alopecic, with sharp and irregular margins,2 and is usually located somewhere on the head and neck. Mehregan and Pinkus3 reviewed 150 cases and found that 95% were located in the head and face area. Histologically, nevus sebaceus is composed of several skin components and is therefore also classified as an organoid nevus.
Pathologic Quiz Case 1. Arch Otolaryngol Head Neck Surg. 1998;124(4):470. doi:10.1001/archotol.124.4.468