We report three cases of eccrine porocarcinoma seen at our hospital.Case 1: A 77-year-old female had a 40×35 mm clearly-demarcated erythema on the lateral aspect of her left thigh, with a 15×17 mm region of erosion in its center. The lesion was locally excised deeply to the fascia, and circumferentially to a distance of 3cm beyond the tumor margin. Histopathologically, the lesion was diagnosed as an eccrine porocarcinoma. Swelling of the inguinal lymph nodes was observed at 14 months after surgery, and lymph node dissection was performed. Two years have now elapsed since the original surger...