Moyamoya
A pattern of progressive obstructive and occlusive cerebral arteritis (inflammation of the cerebral arteries that obstructs and occludes them), predominantly in children and young adults. Symptoms include headaches, behavioral abnormalities, and recurrent attacks of paralysis. The radiology findings are helpful in the diagnosis.
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- Mitral regurgitation
Backflow of blood from the left ventricle to the left atrium due to mitral valve insufficiency.
- Mitral prolapse
Drooping down or abnormal bulging of the mitral valve cusps during the contraction of the heart.
- Mitral insufficiency
A malfunction of the mitral valve that permits the backflow of blood (regurgitation) from the left ventricle into the left atrium. Most mitral insufficiency is mild and requires no treatment. When severe, however, treatment with medications and sometimes surgery is necessary.
- Mitotic nondisjunction
The failure in mitosis for the two members of a chromosome pair to separate (to disjoin) normally so that both chromosomes go to one daughter cell while none go to the other daughter cell.
- MPO deficiency
Myeloperoxidase deficiency.