Regression of metastatic hypernephroma.

A 71-year-old woman had massive pulmonary metastases from a right hypernephroma, as shown by a chest roentgenogram. Nine days after nephrectomy, there was no roentgenographic evidence of such metastases. This represents the most rapid regression of clear-cell pulmonary metastases ever reported. Metastases reappeared six months postoperatively and the patient died of widespread metastatic disease 18 months after nephrectomy. The unpredictable behavior of metastatic hypernephroma is discussed.