Spontaneous regression of histologically proved pulmonary metastases from renal cell carcinoma: a case with 5-year followup.

Spontaneous regression of biopsy proved metastatic renal cell carcinoma is rare. We describe a 39-year-old man who had histologically proved metastatic disease to the lungs after nephrectomy. The lesions had spontaneously regressed 3 months later. The patient remained without evidence of recurrence 5 years after diagnosis.