title: Agenesis of the corpus callosum associated with MASA syndrome.
abstract: MASA syndrome includes mental retardation, adducted thumbs, shuffling gait and aphasia or speech delay. MASA syndrome, X-linked hydrocephalus and X-linked spastic paraplegia have been linked to the same markers on Xq28 and perhaps represent variation in the clinical expression of the same gene or manifestations of different mutant alleles. The present family includes five males in two generations with borderline to mild mental retardation (5/5), speech delay (5/5), spastic paraplegia (5/5), adducted thumbs (2/5) and marked hydrocephalus (1/5). Of these males, four were evaluated by MRI or CT scan and all four were determined to have partial to complete agenesis of the corpus callosum (ACC). DNA studies confirm linkage to Xq28 probe St14 (DXS52) with a lod score of 2.86 and no recombination. It is not known if X-linked ACC is linked to the same Xq28 region.
authors.affiliation: Greenwood Genetic Center, SC 29646.
authors.forename: E
authors.initials: E
authors.lastname: Boyd
authors.forename: C E
authors.initials: CE
authors.lastname: Schwartz
authors.forename: R J
authors.initials: RJ
authors.lastname: Schroer
authors.forename: M M
authors.initials: MM
authors.lastname: May
authors.forename: S D
authors.initials: SD
authors.lastname: Shapiro
authors.forename: J F
authors.initials: JF
authors.lastname: Arena
authors.forename: H A
authors.initials: HA
authors.lastname: Lubs
authors.forename: R E
authors.initials: RE
authors.lastname: Stevenson
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D000328:Adult; D061085:Agenesis of Corpus Callosum; D003337:Corpus Callosum / Q000000981:diagnostic imaging; D005260:Female; D008040:Genetic Linkage; D005819:Genetic Markers; D006801:Humans; D008607:Intellectual Disability; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D011859:Radiography; D013577:Syndrome; D013933:Thumb / Q000002:abnormalities; D014960:X Chromosome
chemical_list: D005819:Genetic Markers