A 35-year-old man was referred with a diagnosis of porocarcinoma. He had undergone local shave biopsy followed by local excision of a small, pedunculated skin lesion on the anterior axillary skin fold. Pathologic diagnosis was porocarcinoma with indeterminate margins. Review of the pathology by the in house dermatopathologist and by AFIP confirmed the diagnosis. Laboratory and radiological workup revealed no evidence of metastatic disease. There was no palpable axillary adenopathy.
Axillary lymphoscintigraphy was performed the night before anticipated wide (2.5 cm margin) local reexcision. A sentinel lymph node was seen beneath the scar. The interval between injection and surgery allowed dissipation of the skin radioactivity, allowing operative localization without prohibitive background interference.
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