LA00.1

ICD-11 MMS 2026-01

Iniencephaly

Description

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.

Index terms

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

Exclusions from above levels

  • http://id.who.int/icd/entity/733825440 – Inborn errors of metabolism

Sibling codes

  • LA00.0 – Anencephaly
  • LA00.2 – Acephaly
  • LA00.3 – Amyelencephaly
  • LA00.Y – Other specified anencephaly or similar anomalies
  • LA00.Z – Anencephaly or similar anomalies, unspecified

Foundation entity

Iniencephaly – http://id.who.int/icd/entity/1558931335

Part of: LA00: Anencephaly or similar anomalies › 20: Developmental anomalies