Since Snger in 1889 drew attention to his 'shaped tumor-chorio-epithelioma, [characterized by extreme malignancy and some of its inherent features, the question of this disease has become the subject of numerous reports and heated debates. However, to this day, the genesis of this disease remains unclear. It is only known that chorio-epithelioma develops in women mainly at the childbearing age and is closely dependent on pregnancy, in particular on pregnancy with a rapid drift. "Without pregnancy," says Veit, "there is no chorio-epithelioma." However, cases of this tumor have been described that are unrelated to pregnancy and even to the female genital sphere. So Volkmann, Di1man, Vlasov, Sch1agenhaufeg, Vasiliev observed chorio-epithelioma in men. Most authors consider such formations to have a teratoid-embryoid character. Many authors have described a similar disease, referring it to sarcomas (Gottschalk), then to carcinomas, even before the start, to the end, and to the end. At the same time, all the attention of researchers was paid to the pathological and anatomical side of this disease. The whole mass of names assigned to this tumor belongs to this time: deciduoma malignum, placentoma, deciduo-sarcoma.