Cylindroma

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     A 48-year-old man presented to the emergency department with acute bleeding from a chronic scalp tumor. He had a "unicorn-like" growth that had been slowly increasing in size for several years and that had been mostly covered by his long hair (Panels A and B). Ulceration of the tip of the tumor had resulted in acute bleeding that had subsided at the time of presentation. Local excision was performed, followed by primary closure of the scalp defect. Histologic examination showed a cylindroma, an appendage tumor with apocrine differentiation within a fibrous dermal matrix. These tumors are generally benign, solitary, and sporadic; usually occur in adults; and usually appear on the forehead or scalp. They grow slowly and may reach 2 to 3 cm in diameter. A second type of cylindroma is dominantly inherited (CYLD1, on chromosome 16q12–13) and may coalesce to form a hat-like growth, giving rise to the term "turban tumor."

    Rabih A. Chaer, M.D.

    Stuart Lipnick, M.D.

    University of Illinois at Chicago

    Chicago, IL 60612

    http://www.100md.com/html/DirDu/2006/11/29/30/38/32.htm