title: [Spontaneous regression of pulmonary images interpreted as metastases of kidney cancer. Apropos of 2 cases].
abstract: The authors report two cases of spontaneous regression of pulmonary metastases from hypernephroma; this is an exceptional event that occurs in 0.8% of metastasized renal carcinomas; spontaneous regression in all cancers as a group occurs in 0.0014% of cases. The theories postulated up till now to explain this phenomenon are unconvincing. The authors suggest the possibility of tumorous emboli: this event, that occurs mainly in those carcinomas with a propensity for extension to veins, such as renal carcinoma, choriocarcinoma, hepatoma and liver metastases, does not necessarily give rise to a metastasis. The evidence that leads to advocate nephrectomy in metastasized renal carcinoma are recalled and discussed.
mesh_terms: D002292:Carcinoma, Renal Cell / Q000556:secondary*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology*; D008175:Lung Neoplasms / Q000556:secondary*; D008297:Male; D008875:Middle Aged; D009365:Neoplasm Regression, Spontaneous
vernacular_title: Régression spontanée d'images pulmonaires interprétées comme métastases de cancer du rein. A propos de deux cas.