Merkel tumor of the lower lip: a case report and updated review of the literature work performed at the University of Illinois.

An unusual case of Merkel cell carcinoma of the lower lip with metastasis to the submental nodes is presented. Clinical similarities and the histopathologic and prognostic differences between this tumor and basal or squamous cell carcinomas of the head and neck area are discussed and the current thoughts for treatment are presented. The capricious clinical course and the aggressive nature of the Merkel cell tumor is emphasized. A review of the existing literature is also included in an effort to familiarize the head and neck surgeon with this relatively new but potentially lethal pathological cutaneous entity.