The Journal of Bone and Joint Surgery, Vol 59, Issue 4 492-495, Copyright © 1977 by Journal of Bone and Joint Surgery, Inc
Extra-articular synovial chondromatosis
FH Sim, DC Dahlin and JC Ivins
Four patients with extra-articular synovial chondromatosis and one patient
with combined intra-articular and extra-articular involvement are
described. In all five patients the lesion was anomalously located (knee,
shoulder, hip, and ankle). The lesion usually occurs in the hands and feet.
Accurate diagnosis is important, because if the synovial origin of the
cartilaginous proliferations is ignored, the evidence of cellular activity
may lead to an erroneous diagnosis of chondrosarcoma. All five patients had
a benign clinical course.