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Autosomal recessive mesoaxial synostotic syndactyly with phalangeal reduction maps to chromosome 17p13.3
Author(s) -
Malik Sajid,
Percin Ferda E.,
Ahmad Wasim,
Percin Sitki,
Akarsu Nurten A.,
Koch Manuela C.,
Grzeschik KarlHeinz
Publication year - 2005
Publication title -
american journal of medical genetics part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.064
H-Index - 112
eISSN - 1552-4833
pISSN - 1552-4825
DOI - 10.1002/ajmg.a.30656
Subject(s) - syndactyly , clinodactyly , biology , genetics , locus (genetics) , phenotype , phalanx , anatomy , dysostosis , medicine , gene , congenital disease
Previously we have described a novel and distinct form of non‐syndromic osseous syndactyly segregating in an autosomal recessive pattern in a consanguineous Pakistani family. The limb findings include mesoaxial reduction of the fingers, synostoses of the third and fourth metacarpals with associated single phalanges, fifth finger clinodactyly, and preaxial webbing of toes. We identified another published report of this phenotype in a large, inbred Turkish family. In the present study we mapped the phenotype in the Pakistani and Turkish families to chromosome 17p13.3 (multipoint LOD score 5.1). The identification of a single locus for this complex limb malformation in two families with distinct ethnic backgrounds supports the hypothesis that this is a distinct form of syndactyly. Since this form of syndactyly is phenotypically distinct from the previously described eight types, we propose to name this phenotype m esoaxial s ynostotic s yn d actyly with phalangeal reduction (MSSD, type IX syndactyly, Malik–Percin type). © 2005 Wiley‐Liss, Inc.