RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A congenital condition where the greater portions of the cerebral hemispheres and CORPUS STRIATUM are replaced by CSF and glial tissue. The meninges and the skull are well formed, which is consistent with earlier normal embryogenesis of the telencephalon. Bilateral occlusions of the internal carotid arteries in utero is a potential mechanism. Clinical features include intact brainstem reflexes without evidence of higher cortical activity. (Menkes, Textbook of Child Neurology, 5th ed, p307)
Synonyms:
exact_synonym:
Cerebral Hemispheres, Absence, Congenital; Congenital Absence of Cerebral Hemispheres; Hemihydranencephalies; Hemihydranencephaly; Hydranencephalies; Hydranencephaly with Proliferative Vasculopathy
ClinVar Annotator: match by term: Fowler syndrome | ClinVar Annotator: match by term: HYDROCEPHALY/HYDRANENCEPHALY DUE TO CEREBRAL VASCULOPATHY | ClinVar Annotator: match by term: Proliferative vasculopathy and hydranencephaly-hydrocephaly syndrome