PIGMENTED VILLONODULAR SYNOVITIS - MRI CHARACTERISTICS

The magnetic resonance imaging (MRI) scans of 26 patients with histopa thologically proven pigmented villonodular synovitis (PVNS), involving joints but excluding tendon sheaths, were reviewed retrospectively. T he purpose of this study is to define the spectrum and frequency of MR I characteristics for PVNS using conventional spin echo (in two cases before and after intravenous administration of gadopentate dimeglumine ) and also gradient echo techniques. A cystic variety is presented, th e MRI appearances of which have not been found in a review of the lite rature.