Treatment of pigmented villonodular synovitis of the knee with yttrium-90 silicate: prospective evaluations by arthroscopy, histology, and 99 mTc pertechnetate uptake measurements. - Franssen,M.J.; Boerbooms,A.M.; Karthaus,R.P.; Buijs,W.C.; Putte van-de,L.B. (Ann Rheum Dis, 1989)