Successful management of life‐threatening choriocarcinoma syndrome with rupture of pulmonary metastatic foci causing hemorrhagic shock

: We report a case of a man with testicular cancer metastatic to the lung and retroperitoneal lymph node, with significant elevation of serum levels of human chorionic gonadotropin, 534 000 mIU/mL. Just after the initiation of chemotherapy, life‐threatening hemothorax occurred and hemorrhagic shock ensued. The pulmonary tumor had broken off, and lower lobectomy was carried out. Pathologic examination of the specimen revealed choriocarcinoma and yolk sac tumor. Through multimodal treatments he achieved complete remission. To our knowledge, this is the first case report of choriocarcinoma syndrome with life‐threatening hemorrhage caused by rupture of pulmonary metastases, resulting in complete remission through multimodal treatments.