BACKGROUND A teratoma is a germ cell tumor that is composed of tissue derived from two or three germ layers.Duodenal teratomas are extremely rare and have been
BACKGROUND Very few studies have been published on the hemodynamic changes associated with spinal anesthesia induced with ropivacaine during cesarean deliveries
BACKGROUND Pancreatic arteriovenous malformation(AVM)is a rare disease with a number of different reported treatment methods,but there are as yet no established