Severe musculoskeletal phenotype associated with an unbalanced t(6;10) translocation: Clarification of the locus for this phenotype on distal 6p

Abstract

Larsen syndrome is a congenital condition consisting of multiple large joint dislocations associated with a distinctive facial appearance and frequently other abnormalities. The syndrome is probably genetically heterogeneous, with both dominant and recessive inheritance reported. Previously two cases have been reported where a Larsen-like syndrome was associated with unbalanced chromosomal translocations resulting in partial trisomy 1q and monosomy distal 6p. We now report a child with an unbalanced translocation resulting in a distal 6p deletion and partial trisomy 10q, who has Larsen-like features and has also severe development delay. A G-banded preparation revealed a karyotype 46,XX,der(..