IRVAN syndrome is a rare disease characterized by retinal vasculitis, retinal aneurysms and neuroretinitis. Patients are usually asymptomatic at diagnosis but over time, proliferativ...

Idiopathic Atrophoderma of Pasini and Pierini is a form of dermal atrophy.

Idiopathic Autoimmune Hemolytic Anemia is a reduction in the number of red blood cells due to the body's immune system.

Idiopathic Hypersomnia (IH) is a chronic neurological disorder characterized by excessive daytime sleepiness and difficulty waking up in the morning or from daytime naps. In IH, these symptoms a...

Idiopathic Interstitial Pneumonia is a rare disorder affecting thetissue and space around the air sacs of the lungs.

Idiopathic Juxtafoveal Macular Telangiectasia is overgrowth and leakage of dilated, twisted, capillaries around the fovea centralis of the retina, leading to distortion, scotomas, and loss of centr...

Idiopathic pulmonary fibrosis (IPF) is a rare disease characterized as a chronic lung disorder, in which the tissues in the lungs gradually thicken or harden over time. IPF is actually...

Idiopathic Pulmonary Haemosiderosis is a rare lung disorder characterized by alveolar capillary bleeding and accumulation of iron (in the form of haemosiderin) in the lungs.

Idiopathic Sensory Polyneuropathy is a disorder affecting the nerves that has no identifiable primary cause.

Idiopathic Thrombocytopenic Purpura is a condition in which the blood does not clot as quickly as it should due to a low number of platelets.

IgA Nephropathy is a rare autoimmune disorder characterized by the toxic build up of immunoglobulin A antibody (IgA) in the kidneys. This excess amount of antibody causes inflammation ...

Inclusion Body Myositis is a rare inflammatory muscle disease.

Incontinentia Pigmenti is a genetic disorder that affects the skin, hair, teeth, and nails.

Infantile neuroaxonal dystrophy (INAD) is a rare, genetic neurological disorder. Symptoms usually present between 6 and 18 months of age. There is often ra...

Intestinal Pseudo Obstruction is a rare disorder characterized by the decreased ability of the intestines to push food through.

Intracranial Lipomas are rare congenital malformations, usually pericallosal asymptomatic midline lesions.

Iritis is characterized by the inflammation of the iris of the eye.

Isaac's Syndrome is a rare neuromuscular disorder.

Isovaleric Acidemia is a rare autosomal recessive metabolic disorder characterized by abnormal buildup of organic acids.