Giant Rheumatoid Cyst of the Calf Simulating a Soft Tissue Tumour

Abstract

Soft tissue swelling and tenderness of the calf is normally interpreted as evidence of thrombophlebitis, abscess, or tumour (1, 2, 3). The purpose of this article is to present a case in a patient with rheumatoid arthritis, where an accumulation of metal corrosion products from a total knee prosthesis in a giant synovial cyst were misdiagnosed from the radiographs and computerized pictures as an intramuscular tumour.