Abstract: A 59-year-old male patient presented with redness, erosion, exudation, and pain in the left middle finger after trauma. The initial diagnosis was infectious granuloma at another hospital and treated with ofloxacin, minocycline and terbinafine for 40 days, yet the lesions showed no improvement. Histopathological examination revealed a large number of nodular tumor cells in the dermis. Combined with immunohistochemical staining results of CK7 (+), GATA3 (+), CK20 (-) and the patient's one-year history of renal cell carcinoma, the diagnosis of skin metastatic carcinoma originating from the renal pelvis was made. The patient did not continue treatment and died one month later.

Key words: cutaneous metastatic carcinoma, infectious granuloma