Case Reports
Tetrasomy 9p: clinical aspects and enzymatic gene dosage expression
- PMID: 6985014
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Case Reports
Tetrasomy 9p: clinical aspects and enzymatic gene dosage expression
Ann Genet.
1982.
Abstract
A girl aged 13 years and 9 months with a phenotypic appearance of 9p trisomy was studied. Chromosome analysis of peripheral blood lymphocytes revealed a 9p tetrasomy [47,XX,+i(9p)] with no evidence of mosaicism. Biochemical studies corroborate the gene dosage effect for galactose-1-phosphate uridyltransferase. The roentgenological findings were quite similar to those of the 9p trisomy except for hypoplastic and angulated ribs, and malformed vertebral bodies, which are probably exclusive of the tetrasomic state.
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