Orphanet: Lobar holoprosencephaly

Search for a rare disease

* (*) mandatory field

Other search option(s)

Suggest an update

(*) Required fields.


Only comments seeking to improve the quality and accuracy of information on the Orphanet website are accepted. For all other comments, please send your remarks via contact us. Only comments written in English can be processed.

Captcha image

Lobar holoprosencephaly

Disease definition

A form of holoprosencephaly characterized by separation of the right and left cerebral hemispheres and lateral ventricules with some continuity only across the frontal neocortex, especially rostrally and ventrally. Craniofacial features are variable may include ocular hypotelorism, midline cleft lip (complete or partial) and/or flat nose amongst other features.


Classification level: Subtype of disorder
  • Synonym(s): -
  • Prevalence: 1-9 / 100 000
  • Inheritance: Multigenic/multifactorial or Not applicable 
  • Age of onset: Infancy, Neonatal
  • ICD-10: Q04.2
  • OMIM: 157170  609637  610829
  • UMLS: C0431362
  • MeSH: -
  • GARD: -
  • MedDRA: -

Detailed information


The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.