Large Subcutaneous Manifestation of Poorly-Differentiated Hidradenocarcinoma in a patient with Concomitant Prostate Adenocarcinoma

Background: Introduction: Hidradenocarcinoma is a rare and aggressive malignancy of eccrine sweat glands. Diagnosis can be difficult due to the dearth of known gene associations and expression profiles. Here, we report an unusual presentation of a large hidradenocarcinoma on the dorsal lumbar region of a male with underlying prostate cancer.