Types of neural tube defects, CDC-Beijing Medical University Collaborative Project, 1993–1996. Infant A—anencephaly, subtype holoanencephaly. Infant B—anencephaly, subtype meroanencephaly. Infant C—occipital encephalocele. Infant D—Craniorachischisis. Infant E—iniencephaly. Infant F—spina bifida, rachischisis, highest level sacral, and open lesion. Infant G—spina bifida, unspecified type, highest level cervical, open lesion. Infant H—spina bifida, unspecified type, highest level thoracic, open lesion. Infant I—spina bifida, unspecified type, highest level lumbar, closed lesion