RT Journal Article SR Electronic T1 A medical soft tissue mass of the knee. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 200 OP 200 VO 30 IS 1 A1 Renato De Stefano A1 Enrico Selvi A1 Roberto Cosentino A1 Stefania Manganelli A1 Elena Frati A1 Roberto Marcolongo YR 2003 UL http://www.jrheum.org/content/30/1/200.abstract AB