畸胎瘤在小儿肿瘤中居第三位,以骶尾部最多见,本院三年来收治3例,就诊断和治疗做如下报告。例一,患儿,杨×,男,1岁,住院号148619。生后3个月见骶尾部偏左一肿物2×3公分,不痛,2个月来增大迅速。查骶尾部偏左一肿物约9×6×8公分,不 Teratoma ranks third in pediatric tumors, and is most common in the sacrococcygeal fistula. Three cases have been treated in this hospital for three years. The following reports on diagnosis and treatment were made. Case 1, children, Yang ×, male, 1 year old, hospital number 148619. After 3 months of life, a mass of 2×3 cm was found on the left side of the sacrococcygeal end, which was painless and was rapidly increased in 2 months. Approximately 9×6×8 cm of a left-sided mass of the tail,