Gouty involvement of the patella and extensor mechanism of the knee mimicking aggressive neoplasm. A case series
Gout is a common inflammatory crystal deposition disease that occurs in many joints throughout the body. Active gout is most often associated with painful synovitis causing searing joint pains, but gout can also produce large masses of space-occupying deposits called tophi. Tophi are most frequently seen in juxta-articular locations with or without bony erosion and are often misdiagnosed as degenerative joint disease. Soft tissue deposits and tendon involvement are also known manifestations of gout, but can present with indeterminate and alarming findings on imaging. We present three cases of tophaceous gout mimicking aggressive neoplasms in the extensor mechanism of the knee. All cases presented as extensor tendon masses eroding into the patella, with imaging findings initially concerning for primary musculoskeletal malignancy.
KeywordsGout Knee Tendon Neoplasm
Compliance with ethical standards
Conflicts of interest
The authors declare that they have no relevant conflicts of interest to disclose.
- 1.Aboulafia, A., MD, Prickett, B., BS, & Giltman, L., MD. (1999). Displaced pathological patellar fracture due to gout. Orthopedics, 22(5), 543-545.Google Scholar
- 5.Konatalapalli, RM, Lumezanu, E., Jelinek, JJ., Murphey, MD., et.al (2012). Correlates of axial gout: a cross-sectional study. J Rheumatol, 39(7), 1445-1449.Google Scholar
- 8.Schlesinger N, Baker DG, Schumacher HR Jr. Serum urate during bouts of acute gouty arthritis. J Rheumatol 1997; 24:2265-2266.Google Scholar
- 9.Ogdie A, Taylor WJ, Weatherall M, et.al. Imaging modalities for the classification of gout: systematic literature review and meta-analysis. Ann Rheum Dis 2015; 74:1868-1874.Google Scholar
- 10.Bongartz T, Glazebrook KN, Kavro SJ, et.al. Dual-energy CT for the diagnosis of gout: an accuracy and diagnostic yield study. Ann Rheum Dis 2015; 74: 1072-1077.Google Scholar