title: Pattern recognition on brain magnetic resonance imaging in alpha dystroglycanopathies.
abstract: Alpha dystroglycanopathies are heterogeneous group of disorders both phenotypically and genetically. A subgroup of these patients has characteristic brain imaging findings. Four patients with typical imaging findings of alpha dystroglycanopathy are reported. Phenotypic features included: global developmental delay, contractures, hypotonia and oculomotor abnormalities in all. Other manifestations were consanguinity (3), seizures (3), macrocephaly (1), microcephaly (3), retinal changes (2) and hypogenitalism (2). Magnetic resonance imaging (MRI) of the brain revealed polymicrogyria, white matter changes, pontine hypoplasia, and subcortical cerebellar cysts in all the patients, ventriculomegaly, callosal abnormalities, and absent septum pellucidum in two and Dandy -Walker variant malformation in three. Magnetic resonace imaging of the first cousin of one the patient had the same characteristic imaging features. Brain imaging findings were almost identical despite heterogeneity in clinical presentation and histopathological features. Pattern recognition of MR imaging features may serve as a clue to the diagnosis of alpha dystroglycanopathy.
authors.affiliation: Department of Neurology, National Institute of Mental Health And Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Parayil S
authors.initials: PS
authors.lastname: Bindu
authors.forename: Narayanappa
authors.initials: N
authors.lastname: Gayathri
authors.forename: Rose D
authors.initials: RD
authors.lastname: Bharath
authors.forename: Anita
authors.initials: A
authors.lastname: Mahadevan
authors.forename: Sanjib
authors.initials: S
authors.lastname: Sinha
authors.forename: A B
authors.initials: AB
authors.lastname: Taly
mesh_terms: D001921:Brain / Q000473:pathology*; D002675:Child, Preschool; D003072:Cognition Disorders / Q000235:genetics / Q000473:pathology / Q000503:physiopathology; D003241:Consanguinity; D049030:Dystroglycans / Q000235:genetics; D006801:Humans; D007223:Infant; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D054220:Malformations of Cortical Development / Q000235:genetics / Q000473:pathology / Q000503:physiopathology; D008831:Microcephaly / Q000235:genetics / Q000473:pathology / Q000503:physiopathology; D012640:Seizures / Q000209:etiology
chemical_list: D049030:Dystroglycans