Rapidly progressive sacroiliitis in a patient with lymphocytic lymphoma.

Rheumatological manifestations may develop as paraneoplastic syndromes in patients with malignancy. Sacroiliitis and spondyloarthropathy have not, however, been previously associated with cancer. The case is described of a patient with a stage IV diffuse well differentiated lymphocytic lymphoma who developed concomitant sacroiliitis and enthesopathies with rapid progression following the diagnosis of malignancy.