<unk>  is an acute, subacute, or chronic infection of skeletal muscle.It is most often seen in young adults. Although viruses, bacteria (including mycobacteria), fungi, and parasites can cause myositis. The most common<unk>  agent is the bacterium, S aureus (77% of cases). Pyomyositis, or bacterial myositis, was once considered a tropical disease but is now seen in temperate climates, particularly with the emergence of HIV infection. Other risk factors for<unk>  include rhabdomyolysis, muscle trauma, cellulitis, infected insect bites, injection of illicit drugs, and diabetes mellitus. Typically, only a single muscle is affected The most common site of infection is the quadriceps muscle. Drainage of the muscle abscess followed by administration of antibiotics remains the mainstay of treatment. Complications of untreated pyomyositis may include a compartment syndrome, progression of infection to osteomyelitis and septic arthritis, and even death.
Infectious myositis
Pyomyositis
Inflammatory myopathy
Statin induced myopathy
Inclusion body myositis
Eosinophilia myalgia syndrome
Polymyalgia rheumatica
Dermatomyositis