Symptoms and Causes

Overview Moyamoya disease is a rare vascular disorder. It causes the carotid artery inside the skull to narrow or become blocked. This major brain artery blockage…

Overview Sarcoma is a type of cancer that develops in bones and soft tissues of the body. Soft tissues include structures that connect and support other…

Overview Metastatic prostate cancer occurs when cancer cells from the prostate gland spread to other parts of the body. This condition is also known as advanced…

Overview Movement disorders affect the nervous system and change how people move. These conditions can cause too much movement or too little movement. Some movements are…

Overview Childhood schizophrenia is a rare but serious mental health condition where young people have trouble interpreting reality correctly. This disorder affects thinking, behavior, and emotions,…

Overview Sleep disorders change how people sleep. These problems might include not sleeping enough, feeling tired after waking up, or being very sleepy during the day….

Overview The spleen serves important functions in fighting infections and filtering old blood cells. A ruptured spleen happens when the surface of this organ breaks, often…

Overview Peripheral nerves act as communication pathways between the brain, spinal cord, and the rest of the body. These delicate structures consist of axons (nerve fibers)…

Overview Polymyositis is a rare inflammatory condition causing symmetric muscle weakness throughout the body. This condition makes everyday movements difficult, such as climbing stairs, standing up…

Overview Metastatic prostate cancer occurs when cancer cells that began in the prostate spread to other areas of the body. This condition is also known as…