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Myxedema coma is a rare condition that needs emergency care. It can occur in a person who has untreated, severe hypothyroidism. It

Iron is partly stored in the body in a form called ferritin. The amount of ferritin in a person's body is frequently measured when

A contracture is the abnormal shortening of muscle or other tissue. It may be caused by muscle spasm, wasting away of tissue and

Ultrasound is high-pitched sound that people cannot hear. These high-pitched sound waves are sometimes used to treat muscle spasms

Drusen are yellowish white deposits that build up beneath the retina. They are a normal result of aging but can also occur with

A molar pregnancy is a mass of abnormal tissue (hydatidiform mole) inside the uterus that causes symptoms of pregnancy. A complete

An abnormally curved upper back, or dowager's hump, develops when the bones of the upper spine (vertebrae) become thin and brittle

Flashes of light are "sparks" that you may see when you move your head. They can happen when the vitreous gel in your eye pulls or

A rubber (aspirating) bulb can be used to remove mucus from a baby's nose or mouth when a cold or allergies make it hard for the

This vaccine is a live but weakened form of the chickenpox (varicella) virus. Children get the chickenpox vaccine as part of their