Resumo

SCHVARTZMAN, P. et al. Caracterización imagenológica de la sinovitis vellonodular pigmentada y el tumor de células gigantes de la vaina sinovial. Rev. argent. radiol. [online]. 2015, vol.79, n.1, pp.4-11. ISSN 1852-9992.

Purpose: To show the resonance magnetic imaging (MRI) findings of pigmented villonodular synovitis (PVNS) and giant cell tumor of the tendon sheath (PVNTS), entities with similar histology but differences in clinical and some radiological manifestations. Materials and methods: We studied 25 cases with histologically benign synovial proliferation in intra and extraarticular location of the extremities. It highlighted with a 1.5T MRI unit the different types of images presentation. The results were analyzed and compared with the literature. Results: MRI displayed very specific imaging features in all patients. However, we were able to distinguish 4 main patterns of presentation depending on the morphology, location of the lesion and radiological differential. These were: as dominant presentation, pigmented villonodular synovitis localized form (n=10); pigmented villonodular synovitis bursal form (n=2); pigmented villonodular synovitis focal (n =5); and pigmented villonodular synovitis diffuse (n = 8). Conclusion: Both pigmented villonodular synovitis as well as giant cell tumor of the tendon sheath are considered similar from the point of view of the histological findings. MRI was useful to objectify both radiological features in common, such as the differential, which along with the location, allow us to classify patterns into 4 individual presentations. This recognition involves adequate radiological evaluation and is important for optimal management.

Palavras-chave : Pigmented villonodular synovitis; Giant cell tumor of tendon sheath; Synovial proliferation.

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