脊髓髓内畸胎瘤为含有三个胚层组织的脊髓先天性肿瘤。我院 1999年 1月曾收治 1例 ,延误诊断较久。本病虽很少见 ,但因对病史重视的不够和应有的神经系统检查的不足 ,是导致误诊的主要原因。1　临床资料　　患者男 ,13岁 ,左下肢无力伴遗尿 1年半 ,右下肢无力 1年入院。患者于 Spinal intramedullary teratoma is a congenital spinal cord tumor that contains three germ layers. In our hospital in January 1999 was admitted to a case, delayed diagnosis for a long time. Although the disease is rare, but not enough attention to the history and the lack of adequate neurological examination is the main reason leading to misdiagnosis. 1 Clinical data Patient male, 13 years old, left lower extremity weakness with enuresis 1 and a half years, right lower extremity weakness 1 year admission. Patient at