Development of rice bodies in 2 children younger than 3 years.

Rice bodies are synovial fluid nodules macroscopically resembling shiny white rice beans. They have been seen in synovial fluid from several types of inflammatory arthritis including tuberculosis, pyogenic arthritis, and juvenile idiopathic arthritis and adult rheumatoid arthritis. Microscopically, they consist of amorphous material, fibrin, and collagen. We report the rare cases of 2 children younger than 3 years with multiple rice body formations in the knee joints.