[Are lung choriocarcinoma and giant cell carcinoma producing chorionic gonadotropins just variants of the same neoplasm?].

An article presents two cases of choriocarcinoma lung metastases. One case revealed the primary mediastinal choriocarcinoma and the second one had unknown primary localisation of the tumor, which could be suggestive of a spontaneously regressed primary gonadal choriocarcinoma. Authors discuss the clinico-pathological aspects of extragonadal choriocarcinomas, theories of their histogenesis and the morphological similarities to anaplastic giant cell lung carcinoma.