[An intra-osseous synovial cyst of the carpal bones. Apropos of 3 cases].

Three additional cases of intra osseous ganglion are reported. These indicate that the carpal cysts tend to occur in young patients with no roentgen or pathological evidence of degenerative process in the neighboring joints. They arise by either intrusion of ganglion-like tissue into bone after fracture or primary skeletal metaplastic phenomenon. Conservative surgical treatment is effective.