Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
Marker, blood: A sign of a disease or condition
that can be isolated from a blood sample. For example, the
monoclonal antibody D8/17 is a diagnostic sign of Pediatric
Autoimmune Disorders associated with Strep....
Marker, tumor: Tumor markers are substances that can be detected in higher-than-normal amounts in the blood, urine, or body tissues of some patients with certain types of cancer. A tumor marker may be made by a tumor itself or by the body in response to the tumor. Such a substance serves to "mark" t...
Marmoreal: Resembling marble. For example, the bone in osteoporosis appears marmoreal. From the Latin noun "marmor" meaning "marble."...
Maroteaux-Lamy syndrome: A form of mucopolysaccharidosis with the clinical onset before age 3 that is characterized by an inability to metabolize dermatan sulfate. This leads to abnormal accumulation of dermatan sulfate, resulting in mild to severe changes in muscle,
bone, skin, and other tissues, ...
Marriage, cousin: A form of consanguinity. Everyone carries recessive
alleles, genes that are generally innocuous in the heterozygous state but that in the
company of another gene of the same type are capable of causing disease. We are all
genetic reservoirs for genetic disease. Since first cousins ...
Marsh fever: See
Marshall W. Nirenberg
Marshall W. Nirenberg: See: Nirenberg, Marshall W....
Marshall-Smith syndrome: A disorder characterized by advanced bone age at birth, broad forehead, prominent eyes, and small chin. There is difficulty feeding, failure to thrive, retarded psychomotor development, and predisposition to respiratory infection. It may be fatal within the first years of li...
Martin Rodbell: See: Rodbell, Martin....
Martinus W. Beijerinck
Martinus W. Beijerinck: See: Beijerinck, Martinus W....
Martorell syndrome: Named after Fernando Martorell Otzet,
Spanish cardiologist (1906-1984). In 1944 Martorell provided an excellent description of a syndrome also known today as Takayasu disease. See: Takayasu disease....
Marx: See: Marx, Gertie F....
Marx, Gertie F.
Marx, Gertie F.: Distinguished German-born American physician known as the "mother of obstetric anesthesia." She almost singlehandedly developed obstetric anesthesiology as a specialty. She advanced the use of epidural injections to ease women's pain during childbirth. She developed an epidural need...
MASA syndrome: MASA stands for mental retardation, aphasia,
gait, and adducted thumbs. Features of the syndrome include:
neurologically: mental retardation and aphasia (lack
limbs: adducted (clasped) thumbs, absent extensor
pollicis longus and/or brevis muscles to t...