These small bodies in the knee joint as seen in this patient are often termed 'rice bodies'. The differential diagnosis for these includes synovial osteochondromatosis, inflammatory arthritis, and tuberculous infection.

Single joint involvement and the lack of any clinical suspicion of infection made the diagnosis of synovial osteochondromatosis more likely in this patient. The presence of larger calcified bodies on the plain films is pathognomonic for synovial osteochondromatosis.