[Spontaneous regression of pulmonary metastasis of cancer of the kidney. Apropos of a case occurring after the irradiation of a pelvic metastasis. Review of the literature].

Spontaneous regression of metastases from cancer of kidney is an exceptional event, original but non-specific to this neoplasm. Observed principally in secondary pulmonary localizations this phenomenon occurs most frequently after nephrectomy. A personal case is presented of regression of pulmonary images considered as being metastatic after irradiation of a pelvic metastasis from renal adenocarcinoma, and a literature review carried out. The various pathogenic hypotheses are discussed and the place of nephrectomy for metastatic renal cancer (Robson's stage IV) debated.