Congenital Abnormality
hydranencephaly
Subclass of:
Congenital neurologic anomalies
Definitions related to hydranencephaly:
-
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)NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
-
A defect of development of the brain characterized by replacement of greater portions of the cerebral hemispheres and the corpus striatum by cerebrospinal fluid (CSF) and glial tissue.Human Phenotype Ontology (HPO)The Human Phenotype Ontology Project, 2021
-
A rare congenital brain disorder in which the cerebral hemispheres are absent and replaced by sacs that contain cerebrospinal fluid. Signs and symptoms include irritability, increased muscle tone, seizures, and hydrocephalus. The prognosis is poor.NCI ThesaurusU.S. National Cancer Institute, 2021
-
Hydranencephaly is a rare condition in which the brain's cerebral hemispheres are absent and replaced by sacs filled with cerebrospinal fluid (CSF). Affected infants may appear and act normal at birth, but irritability and hypertonia often develop within a few weeks. Other signs and symptoms may include seizures, hydrocephalus, visual...National Center for Advancing Translational Sciences
Return to OpenMD Medical Dictionary
> H
This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.