[Perioperative management of a neonate with a retroperitoneal giant teratoma who underwent its extirpation under general anesthesia: a case report].

Abstract We gave anesthesia to a neonate with a retroperitoneal giant teratoma who underwent its extirpation. Even if patients have a prenatal diagnosis of teratoma like this case, there are many patients, especially infants, with severe general condition. We report the difficulty for management during anesthesia because of severe respiratory acidosis due to pressure from diaphragmatic pleura by tumor, severe circulatory disorder due to massive bleeding during operation and severe hyperkalemia due to renal failure.