Acrometastasis of Occult Renal Cell Carcinoma: A Case Report

Renal cell carcinoma is a common malignancy with 30,000 new cases reported annually in the U.S. While bone is one of the most common sites of metastases of renal cell carcinoma, acrometastases are rare with an estimated incidence of 0.1 percent among patients with malignant disease. We present an 89-year-old white male who presented with a painful mass of the left thenar eminence. A preoperative medical evaluation revealed metastatic renal cell carcinoma with lytic infiltration of the diaphysis of the left thumb metacarpal with soft tissue involvement. The patient was treated with two intralesional currettage procedures and later radiation therapy. This approach allowed the patient to maintain functional use of the thumb for activities of daily living.