Symptoms and Causes

Overview Mesenteric ischemia occurs when blood flow to the small intestine becomes restricted due to narrowed or blocked arteries. It affects the mesentery—the tissue that connects…

Overview Diabetic nephropathy affects about 1 in 3 people with diabetes in the United States. This serious kidney condition can develop in both type 1 and…

Overview Prolactinoma is a benign (noncancerous) tumor that develops in the pituitary gland, located at the base of the brain. This type of tumor causes the…

Overview Color blindness affects how people see certain colors. Despite its name, most people with this condition don’t see the world in black and white. The…

Overview Ehrlichiosis and anaplasmosis are tick-transmitted diseases that share similar symptoms resembling the flu. These include fever, headaches, and muscle pain that typically develop within 14…

Overview Pulmonary stenosis happens when the valve between the right lower heart chamber and lung arteries becomes narrow. This narrowing makes it harder for blood to…

Overview Pediatric brain tumors are cell growths that begin in or around the brain in children. These tumors can expand and press against nearby brain regions,…

Overview Vocal cord paralysis occurs when the nerves controlling the vocal cords become damaged or stop working properly. The vocal cords, also called vocal folds, not…

Overview Adnexal tumors develop in the tissue near the uterus, including the ovaries, fallopian tubes, and the connective tissues that support these organs. These growths can…

What Is Smallpox? Smallpox is a serious, highly contagious disease caused by the variola virus. The disease is now considered eradicated worldwide, with the last natural…