ECCRINE SYRINGOFIBROADENOMA SURROUNDING A SQUAMOUS-CELL CARCINOMA - ACASE-REPORT

A 91-year-old man presented with a 9.0 x 7.0 cm exophytic mass on the dorsum of the right foot, surrounded by a scaling hyperkeratotic plaqu e-like lesion that had been present for many years. He had similar lon g-standing hyperkeratotic plaque-like lesions on both legs. Histopatho logic examination of the exophytic mass revealed a well-differentiated squamous cell carcinoma surrounded by an eccrine syringofibroadenoma (ESFA). Histochemistry, immunohistochemistry and electron microscopy s upport this diagnosis. To our knowledge, this is the only reported cas e of ESFA being intimately associated with a malignant neoplasm.