In 1854, the first account of pigmented villonodular synovitis was that of Chassaignac and Jaffe et al. introduced the term in 1941. It is a proliferative disorder of the unknown etiology. Characteristic pathologic finding is villous and/or
nodular
change in synovium tendon sheaths and bursae. The cause is not discovered but is thought as chronic inflammatory reaction or benign tumor originated from fibrohistiocytic cell. We analysed 7 cases that were diagnosed and treated as pigmented
villonodular synovitis from Jan. 1981 to Dec. 1991 and average follow-up for 2 years 8 months.
The average age at initial visit wa 26.3 years. male were 4 cases and female 3 cases The sites were the knee in 6 cases and the ankle in 1 case. The chief complaints at the knee were pain in 3 cases, painful swellig in 2 cases, and painless
swelling in
1 case and at the ankle painless mass in 1 case. The duration from onset of the symptom to the operation was 2 years 11 months. Previous history of the trauma and the operation was not noted. In the physical examination there were 3 cases of
limitaion
of motion of the knee. In the radiologic examination, increased soft tissue density was appeared in 3 cases and pressure erosion of cortex in 1 case. In the hematologic evaluation, abnormality was not found except mild increase of ESR in 2 cases.
The
treatment was synovectomy with excision of mass in 6 cases and the excision of the mass in 1 case. Radiation therapy was not performed. Recurrence was not found. In three cases of knee, limitation of the motion was persist but improved by
Brisement
force and passive assistive physiotherapy in 2 case.
In summary, a mass or a painful condition around the joint can be suspected as pigmented villonodular synovitis. Simple radiologic finding and MRI is heplful in diagnosis and operation seems to be the treatment of the choice. Postoperatively
intensive
physiotherapy is necessary to prevent stiffness of the joint.
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