RT Journal Article SR Electronic T1 Monarthritis: an unusual presentation of renal cell carcinoma. JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 681 OP 682 DO 10.1136/ard.51.5.681 VO 51 IS 5 A1 K K Chakravarty A1 M Webley YR 1992 UL http://ard.bmj.com/content/51/5/681.abstract AB Two cases of acute monarthritis secondary to asymptomatic renal cell carcinoma are described. This association has not previously been reported. The patients were initially thought to have a septic arthritis, but hot spots were seen on isotope bone scans and biopsy samples showed secondary neoplasms, which were later confirmed to be a result of renal cell carcinomas. The value of cytological examination of synovial fluid when there is clinical doubt as to the cause of a joint effusion is shown.