MR Imaging of the Pigmented Villonodular Synovitis of the Knee.
10.3348/jkrs.1994.31.1.165
- Author:
Sang Hoon LEE
;
Joong Mo AHN
;
Heung Sik KANG
;
Chu Wan KIM
;
Han Koo LEE
- Publication Type:Original Article
- MeSH:
Cell Proliferation;
Diagnosis;
Fibrosis;
Hemosiderin;
Humans;
Knee*;
Magnetic Resonance Imaging*;
Retrospective Studies;
Synovitis, Pigmented Villonodular*
- From:Journal of the Korean Radiological Society
1994;31(1):165-170
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To describe the magnetic resonance (MR) findings of pigmented villonodular synovitis(PVNS) of the knee, and to evaluate the clinical value of MR in the diagnosis of PVNS. MATERIALS AND METHODS:MR imagings of seven patients with PVNS were studied. The type of lesion, presence of bony erosion, the signal intensity, and the relationship between contrast enhancement and signal intensity on T2-weighted images were analyzed, retrospectively. RESULTS: The lesion was mainly villous in three patients and nodular in four, and bony erosion was seen in one patient. On T2-weighted image, the signal intensity of the villous form was mixed iso- and hypointense in two, hypointense in one, and that of the nodular form was heterogeneous with hypo-, iso-, and hyperintensities. The hypointense portion on T2-weighted image showed poor contrast enhancement, which may suggest hemosiderin deposition or advanced fibrosis. The iso- or hyperintense portion on T2-weighted image showed strong enhancement, which suggest active cellular proliferation. CONCLUSION:MR imaging could be a very useful modality in the diagnosis as well as prediction of histological findings of the PVNS.
