Musculoskeletal disorders 

Gout is a recurrent acute arthritis of peripheral joints which results from deposition, in and about the joints and tendons, of crystals of monosodium urate from supersaturated hyperuricaemic body fluids. The arthritis may become chronic.

Osteomyelitis is an infection of the bone, and is most common in children under 12 years. Staphylococci are the most frequent responsible organisms.

Tropical pyomyositis is a primary bacterial infection of skeletal muscle characterized by localized abscess formation, muscle necrosis, and systemic inflammatory response. It predominantly affects large muscle groups and occurs most frequently in tropical and subtropical climates.

Rheumatoid arthritis is an autoimmune condition whereby the immune system attacks the synovial membrane of joints, initially of the small joints but progressively involving the big joints.