Pigmented villonodular synovitis

Dirseğin Patolojik Değişiklikleri

“…Pigmente villonodüler sinovitte, SE ve özellikle GRE sekanslarda kalın sinovyumda hemosiderin depolanmasına ait düşük sinyal izlenmesi tanıya büyük katkı sağlamaktadır [6]. İdiyopatik sinovyal osteokondromatoziste sinovyal döşemede, metaplazi ve intrasinovyal kıkırdak nodülleri mevcuttur.…”

Pediatric Soft-Tissue Tumors and Pseudotumors: MR Imaging Features with Pathologic Correlation

“…It most commonly affects the knee joint and is seen clinically as insidious swelling and intermittent pain (32). The most commonly affected regions within the knee are the Hoffa fat pad, the suprapatellar bursa, and the posteromedian synovial joint recess, an area that is difficult to see at arthroscopy and thus important to assess at MR imaging (31).…”

“…PVNS classically appears as an irregularly thickened or frondlike synovium, hypointense on both T1-and T2-weighted images. This characteristic low signal intensity is due to hemosiderin deposition and is exaggerated by signal drop-off or blooming with gradient-echo sequences (29)(30)(31)(32)(33)(34) (Fig 9). The appearances of PVNS with a gadolinium contrast agent may vary depending on the degree of fibrosis, but most lesions show avid enhancement (32).…”

“…This characteristic low signal intensity is due to hemosiderin deposition and is exaggerated by signal drop-off or blooming with gradient-echo sequences (29)(30)(31)(32)(33)(34) (Fig 9). The appearances of PVNS with a gadolinium contrast agent may vary depending on the degree of fibrosis, but most lesions show avid enhancement (32). Because of this, the characteristic low signal intensity seen on unenhanced images can be lost after the use of gadolinium (31,33,35).…”

Multidisciplinary Management of Soft-Tissue Sarcoma

“…Pigmented villonodular synovitis (PVNS) is a benign intraarticular locally aggressive mass that can be readily diagnosed with MR imaging, owing to the characteristic low signal intensity on T1-weighted images and heterogeneous low signal intensity on T2-weighted images (31). PVNS can be focal and nodular or have a more diffuse infiltrative appearance.…”