MORM syndrome (mental retardation, truncal obesity, retinal dystrophy and micropenis), a new autosomal recessive disorder, links to 9q34.
A consanguineous pedigree is described where 14 individuals are affected with a novel autosomal recessive disorder, which causes static moderate mental retardation, truncal obesity, a congenital nonprogressive retinal dystrophy and micropenis in males. We have tentatively named this condition MORM syndrome. It shows similarities to Bardet-Biedl syndrome and Cohen syndrome, but can be distinguished by clinical features; the age of onset and nonprogressive nature of the visual impairment, the lack of characteristic facies, skin or gingival infection, microcephaly, 'mottled retina', polydactyly and small penis without testicular anomalies. Furthermore, linkage to the known Bardet-Biedl (BBS1-8) and Cohen syndrome loci was excluded. Autozygosity mapping identified a single homozygous subtelomeric region shared by all affecteds on chromosome 9q34.3, with a maximum LOD score of 5.64. We believe this to be the first example of the identification of a subtelomeric recessive locus by autozygosity mapping.
Hampshire
Daniel J
DJ
Molecular Medicine Unit, University of Leeds, St James's University Hospital, Leeds LS9 7TF, UK.
Ayub
Mohammed
M
Springell
Kelly
K
Roberts
Emma
E
Jafri
Hussain
H
Rashid
Yasmin
Y
Bond
Jacquelyn
J
Riley
John H
JH
Woods
C Geoffrey
CG
D002874:Chromosome Mapping; D002899:Chromosomes, Human, Pair 9; D005128:Eye Diseases / Q000175:diagnosis / Q000235:genetics; D005260:Female; D005808:Genes, Recessive; D008040:Genetic Linkage; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000235:genetics; D008126:Lod Score; D008297:Male; D008957:Models, Genetic; D009765:Obesity / Q000175:diagnosis / Q000235:genetics; D013577:Syndrome