Pathologic quiz case: an enlarging, firm nodule on the abdominal skin in an otherwise healthy 73-year-old woman

Benign nodular hidradenoma of the face

A very rare case of nodular hidradenoma with an atypical clinical presentation of the face of a 70-year-old woman is presented. Although this rare benign tumor has the potential of local recurrence and malignant transformation, it is commonly reported in the dermatology, pathology, and oncology literature, with limited clinical information. The purpose of this report was to emphasize the clinical features of this lesion for plastic surgeons.