Young males with primary lymphoma of bone presenting with musculoskeletal pain are prone to be misdiagnosed as ankylosing spondylitis: a case report.

Primary lymphoma of bone (PLB) is an uncommon clinical entity. Pain in the skeleton and pelvis is a frequent complaint which may be partly relieved by nonsteroidal anti-inflammatory drugs. So, the patients suffering from PLB are easily referred to the rheumatologist and often be misdiagnosed as rheumatic diseases. Here, we described a case of PLB presenting with rheumatic pain.