Galactosemia is a rare, hereditary disorder of carbohydrate metabolism that affects the body's ability to convert galactose (a sugar contained in milk, including human mother's milk) to glucose (a different type of sugar). Galactose is converted t...

Chronic granulomatous disease (CGD) is a rare inherited primary immune deficiency disorder that affects certain white blood corpuscles (neutrophils, monocytes, macrophages, eosinophils). The disorder is characterized by an inability to resist repe...

Radiation sickness is damage to your body caused by a large dose of radiation often received over a short period of time (acute). The amount of radiation absorbed by the body — the absorbed dose — determines how sick you'll be. ...