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May 2004

Nodule on the Back of a 73-Year-Old Woman—Diagnosis

Author Affiliations
 

MICHAEL E.MINGMD

Arch Dermatol. 2004;140(5):609-614. doi:10.1001/archderm.140.5.609-f

A biopsy specimen of the lesion demonstrated well-defined dermal nodules of basaloid cells with foci of glycogenation, necrosis, and hemorrhage. Duct formation was observed.

In 1966, Winkelmann and McLeod1 described the dermal duct tumor as a distinct dermal tumor composed of masses of adnexal duct tissue. There is some controversy as to whether dermal duct tumor is a distinct entity from a poroma. Tumor size ranges from a few millimeters to 2 cm, and most lesions appear as flesh-colored or red papules and plaques.14 The majority occur in adult women in the head and neck region.13 In older men, the tumors often appear on the legs or arms.46

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