Alternative titles and symbols : Cushing symphalangism; Hereditary absence of the proximal interphalangeal joints; SYM1;
Description : Proximal symphalangism (SYM1) is an autosomal dominant disorder characterized by ankylosis
of the proximal interphalangeal joints, carpal and tarsal bone fusion, and conductive
deafness (summary by Takahashi et al., 2001). - Genetic Heterogeneity of Proximal
Symphalangism Another form of proximal symphalangism (SYM1B; 615298) is caused by
mutation in the GDF5 gene (601146);
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the homolog of the mouse Noggin gene (NOG, 602991.0001);