Marmoreal
Resembling marble. For example, the bone in osteoporosis appears marmoreal. From the Latin noun “marmor” meaning “marble.”
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- 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 share a set of grandparents, for any particular allele (gene) […]
- 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 life. The cause of the syndrome is unknown. It is named for Richard E. Marshall […]
- 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 needle that bears her name and she was the founding editor of Obstetric Anesthesia Digest. Dr. Marx died […]
- MASA syndrome
lumbar lordosis (sway back). MASA is inherited as an X-linked trait and so affects mainly boys. Alternative names for MASA include clasped thumb and mental retardation, congenital clasped thumb with mental retardation, adducted thumb with mental retardation, and the Gareis- Mason syndrome.
- Mask of pregnancy
Muddy-brown pigmentation on the cheeks or elsewhere on the face that develops in about half of all women during pregnancy. Some women also develop it outside pregnancy, as do some women on hormone therapy. The pigmentation is worsened by ultraviolet (UV) light, which tends to darken it. Regular use of a broad-spectrum sunscreen against both […]