[A case of spontaneous disappearance of pulmonary metastasis of renal cell carcinoma following nephrectomy].

A 76-year-old man was admitted to our hospital on October 3, 1988 complaining of general fatigue and left flank pain. A large movable mass was palpable in his left flank. Intravenous pyelography and computerized tomography confirmed left renal tumor. Chest X-ray showed a coin lesion in the left lung. Left nephrectomy was performed on October 14, 1988. Histopathological diagnosis was adenocarcinoma of clear cell type. Chest X-rays, on the postoperative eleventh day, showed disappearance of the pulmonary coin lesion which was seen preoperatively. Recurrence of pulmonary metastasis has not been seen for 14 months after operation.