| A type of Ehlers-Danlos syndrome characterized by generalized joint hypermobility, skin hyperextensibility and easy bruising without atrophic scarring. Other common features include foot and hand deformities (piezogenic papules, pes planus, broad forefeet, brachydactyly, and acrogenic skin of hands), severe fatigue and neuromuscular symptoms including muscle weakness and myalgia. Caused by homozygous or heterozygous mutation in the tenascin-XB gene on chromosome 6p21. |