Glycogen storage disease (GSD) is a rare condition that changes the way the body uses and stores glycogen, a form of sugar or glucose.

Tumors on your pancreas, called insulinomas, make extra insulin, more than your body can use. This causes blood sugar levels to drop too low. This can cause symptoms of low blood sugar or hypoglycemia.

Achilles tendon injuries affect the Achilles tendon, a fibrous band of tissue that links the muscles in your calf to your heel. The strength and flexibility of this tendon are important for jumping, running, and walking.

Oral hairy leukoplakia is a condition triggered by the Epstein-Barr virus. The condition causes white patches on your tongue. It happens most often in people with weak immune systems.

If you have hemophagocytic lymphohistiocytosis, your immune system does not work normally. Certain white blood cells - histiocytes and lymphocytes - attack your other blood cells. These abnormal blood cells accumulate in your spleen and liver, causing these organs to enlarge.

Gaucher disease is a rare genetic disorder passed down from parents to children (inherited). When you have Gaucher disease, you are missing an enzyme that breaks down fatty substances called lipids. Lipids start to build up in certain organs, such as your spleen and liver.

Your pancreas plays a major role in digestion. It is located inside your abdomen, just behind your stomach, and it is about the size of your hand.

Mesenteric ischemia is decreased or blocked blood flow to your intestine.

The large intestine is 1 of the many important parts of your digestive tract. This is a series of organs that begins with your mouth and ends with your anus, the opening of your rectum.

A traumatic brain injury is caused by a blow to or penetration of the head resulting in brain damage. Read on to learn about diagnosis, symptoms, and treatment.