[Tumorous and pseudotumorous cartilaginous lesions of the soft tissues of the hand].

The authors present several rare cartilaginous tumours and pseudotumours of the extraskeletal tissues in an unusual situation, the hand. They present three different varieties depending on the site and histogenesis of the tumour: 1) Intra-articular synovial chondromatosis. 2) Tenosynovial chondromatosis. 3) Soft tissue chondroma (extra-synovial). The authors also discuss the histogenesis of these lesions: synovial for the first two types and an extra-synovial connective tissue origin for the last type.