Nonepidermal and appendageal skin tumors.

This article reviews the essential clinical and pathologic features of a number of tumors of the dermis and epidermal appendages to help improve the clinician's skill at formulating preoperative differential diagnoses, assessing the need for treatment, and determining appropriate follow-up. In addition, it attempts to alert the practitioner to a number of heritable and systemic conditions that may be signalled by the presence of cutaneous tumors.