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Patient information: Shoulder impingement syndrome Author Bruce C Anderson, MD Section Editor Karl B Fields, MD Deputy Editor Jonathan Grayzel, MD, FAAEM Disclosures SHOULDER IMPINGEMENT SYNDROME OVERVIEW — Impingement syndrome…

Inflammatory Myopathies Inflammatory myopathies are muscle diseases caused by inflammation. They are autoimmune diseases where the body’s immune system attacks its own muscles by mistake. The most common inflammatory myopathies…

Chronic Recurrent Multifocal Osteomyelitis (CRMO) Chronic recurrent multifocal osteomyelitis (CRMO), or chronic nonbacterial osteomyelitis (CNO), is an autoinflammatory disorder that causes bone pain due to inflammation in the bones not…

Juvenile Arthritis Juvenile idiopathic arthritis (JIA) is chronic arthritis that affects approximately 1 in every 1,000 children. JIA affects children less than 16 years of age. It is not usually…

Cryopyrin-Associated Autoinflammatory Syndromes (CAPS) Cryopyrin-associated autoinflammatory syndromes (CAPS) are rare diseases related to a defect in the cryopyrin protein. CAPS diseases usually start in very young children. CAPS include Neonatal…

Kawasaki Disease (KD) Kawasaki disease (KD) is a childhood illness that causes vasculitis (inflamed blood vessels). KD is more common in children younger than 5 years old. KD occurs more…

Dermatomyositis (Juvenile) Juvenile dermatomyositis (JDM) is a disease in which a child’s immune system primarily attacks the skin and muscles or blood vessels. The cause of JDM remains unknown to…

Localized Scleroderma (Juvenile) Localized scleroderma, called "linear" or "morphea", is an autoimmune condition that causes hardening and inflammation of the skin and muscles in one part of the body. The…

Familial Mediterranean Fever Familial Mediterranean Fever (FMF) is a non-infectious genetic disorder manifested by episodic fevers typically accompanied by pain in the abdomen, joints, or chest. FMF is caused by…

Lupus Systemic lupus erythematosus (SLE) is a chronic disease that causes systemic inflammation which affects multiple organs. SLE often starts in females during their fertility age, although it can sometimes…

Fibromyalgia Fibromyalgia is a chronic condition that causes widespread pain. It affects 2-4% of people, usually women. People who have other rheumatic diseases are at higher risk of having fibromyalgia.…

Lyme Disease Lyme disease is an infection caused by the Borrelia burgdorferi bacteria. Deer ticks and Western blacklegged ticks can bite humans and pass on the infection. Lyme disease is…