UniProtKB/Swiss-Prot:
73
A bone disease characterized by short stature, distinctive midface retrusion, progressive knee malalignment (genu valgum and/or varum), generalized ligamentous laxity, and mild spinal deformity. Intellectual development is not impaired. Radiographic characteristics include significantly retarded epiphyseal ossification that evolves into epiphyseal dysplasia and precocious osteoarthritis, metaphyseal irregularities and vertical striations, constricted femoral neck, slender metacarpals and metatarsals, and mild thoracolumbar kyphosis or scoliosis with normal or mild platyspondyly. The most distinctive features for differential diagnosis of SEMDJL2 are the slender metacarpals and phalanges and the progressive degeneration of carpal bones; however, these 2 features are evident only in older children and young adults. The soft consistency of cartilage in the airways leads to laryngotracheomalacia with proneness to respiratory obstruction and inspiratory stridor in infancy and childhood.
MalaCards based summary:
Spondyloepimetaphyseal Dysplasia with Joint Laxity, Type 2, also known as semdjl2, is related to spondyloepimetaphyseal dysplasia with joint laxity and spondyloepimetaphyseal dysplasia with multiple dislocations. An important gene associated with Spondyloepimetaphyseal Dysplasia with Joint Laxity, Type 2 is KIF22 (Kinesin Family Member 22). Affiliated tissues include bone and skin, and related phenotypes are scoliosis and hypotonia
OMIM®:
57
Spondyloepimetaphyseal dysplasia with joint laxity type 2 (SEMDJL2) is characterized by short stature, distinctive midface retrusion, progressive knee malalignment (genu valgum and/or varum), generalized ligamentous laxity, and mild spinal deformity. Intellectual development is not impaired. Radiographic characteristics include significantly retarded epiphyseal ossification that evolves into epiphyseal dysplasia and precocious osteoarthritis, metaphyseal irregularities and vertical striations, constricted femoral neck, slender metacarpals and metatarsals, and mild thoracolumbar kyphosis or scoliosis with normal or mild platyspondyly (summary by Min et al., 2011).
For a discussion of genetic heterogeneity of SEMD with joint laxity, see SEMDJL1 (271640). (603546) (Updated 08-Dec-2022)
Disease Ontology:
11
A spondyloepimetaphyseal dysplasia with joint laxity characterized by short stature, distinctive midface retrusion, progressive knee malalignment, generalized ligamentous laxity, multiple joint dislocations, and mild spinal deformity that has material basis in heterozygous mutation in KIF22 on chromosome 16p11.2.
