Familial multiple epiphyseal dysplasia due to a matrilin‐3 mutation: Further delineation of the phenotype including 40 years follow‐up

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Abstract
In this study, we followed‐up the family with bilateral hereditary micro‐epiphyseal dysplasia (BHMED) originally described by Elsbach [1959: J Bone Joint Surg [Br] 41‐B:514–523]. Clinical re‐examination of all available family members resulted in further delineation of the clinical and radiological phenotype, which is distinct from common multiple epiphyseal dysplasia (MED). Linkage analysis excluded EDM1, EDM2, and EDM3 as candidate genes. Linkage and mutation analysis of matrilin‐3 (MATN‐3) revealed a new pathogenic mutation confirming that BHMED is indeed a distinct disease entity among MED and MED‐like disorders.