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LA00.1 Iniencephaly

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Iniencephaly is a rare form of neural tube defect in which a malformation of the cervico-occipital junction is associated with a malformation of the central nervous system. The cardinal features are occipital bone defect, partial or total absence of cervicothoracic vertebrae, fetal retroflexion of the head and characteristic absence of the neck. It is associated with malformations of the central nervous (spina bifida and/or anencephaly), gastrointestinal (omphalocele) and cardiovascular systems.

synonyms

• Iniencephaly
• Iniencephalus
• Open iniencephaly
• Open iniencephalus
• Closed iniencephaly
• Close iniencephalus

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