2000, pp 1491-1509

Adnexal Tumors

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Adnexal tumors are a confusing aspect of dermatology. They are relatively uncommon yet occupy at least 10% of the pages of almost all the current dermatopathology texts. In most instances, they are a solitary skin-colored to red nodule, often on the head, with a differential diagnosis of melanocytic nevus, epidermoid cyst and basal cell carcinoma. Excision is curative. Most adnexal tumors are benign; frequently they have a fibrous pseudocapsule and shell out easily when removed surgically. Microscopically the benign tumors are symmetrical, have a vertical growth pattern and sharp borders. There are frequent histologic overlaps. We will not repeat these basic facts for each tumor, but only point out where they differ from the trend.