What is meatal stenosis Meatal stenosis is a narrowing of the opening of the urethra, the tube through which urine leaves the body. Urinary meatal

What is a mastoidectomy A mastoidectomy is surgery to remove cells in the hollow, air-filled spaces in the skull behind the ear within the mastoid

What is Meckel’s diverticulum Meckel’s diverticulum is a small pouch on the wall of the lower part of the small intestine, near the junction of

What is malignant hypertension Malignant hypertension also called hypertensive emergency or hypertensive crisis, is very high blood pressure that comes on suddenly and quickly. Malignant

What is macroglossia Macroglossia is an abnormally large tongue in proportion to other structures in the mouth. Macroglossia can be associated with a wide range

What is plethysmography Plethysmography is used to measure changes in volume in different parts of the body. Plethysmography may be done to check for blood

Long bone anatomy A long bone is a bone that has greater length than width. A long bone has a shaft and 2 ends. Long

What is macrosomia Macrosomia also called fetal macrosomia, refers to a baby that is considerably larger than normal. A baby diagnosed with fetal macrosomia has a

What is lithium toxicity Lithium is a prescription medicine used to treat bipolar disorder. Lithium is a medicine with a narrow range of safety. Significant

What is lactate dehydrogenase Lactate dehydrogenase (LDH) is an enzyme involved in energy production that is found in almost all of the body's cells, with