1973年10月一位18岁的贫农女社员因右下腹疼痛、肿胀被诊断为“卵巢囊肿”施行右侧卵巢摘除术。病理组织学检查报告是“大片恶性肿瘤细胞,性质不能肯定(畸胎癌?)”。病人手术时抽取的腹水用琼脂双相扩散法检查了对于抗甲胎蛋白的反应,结果呈阳性。继用“火箭”电泳法测定其中甲胎蛋 In October 1973, an 18-year-old female member of the poor peasant family was diagnosed as “ovarian cyst” with right ovarian extirpation due to pain in the right lower quadrant. Histopathology report is “a large number of malignant tumor cells, the nature can not be sure (teratocarcinoma?)”. The ascites extracted from the patient during surgery was tested for anti-alpha-fetoprotein response by agar biphasic diffusion and the result was positive. Following the use of “rocket” electrophoresis method in which a fetus