Myeloproliferative disorders
Malignant diseases of certain bone marrow cells including those that give rise to the red blood cells, the granulocytes (types of white blood cells), and the platelets (crucial to blood clotting).
The myeloproliferative disorders include myelophthisic anemia, erythroblastic leukemia, leukemoid reaction, myelofibrosis, myeloid metaplasia, polycythemia vera, and thrombocytosis. The myeloproliferative disorders are in contrast to the lymphoproliferative disorders which are malignancies of lymphoid cells and cells of the reticuloendothelial system (such as macrophages) which can take up inert particles and sequester them.
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- Myo- (prefix)
A prefix denoting a relationship to muscle. Myo- enters into many words and terms in medicine including cardiomyopathy, dermatomyositis, electromyography, leiomyoma, myocardial infarction, myocarditis, myocardium, myoclonic, myocyte, myopathy, myoglobin, myometrium, myotonia, myotonic dystrophy, and polymyositis.
- Myocardial bridge
Literally a bridging of heart muscle over one of the major arteries to the heart (usually the left anterior descending artery). The heart has formed in this abnormal design from birth, whereby the artery is actually ‘tunneled’ through a part of the heart muscle.
- Myocardial infarction
A heart attack. Abbreviated MI. The term “myocardial infarction” focuses on the myocardium (the heart muscle) and the changes that occur in it due to the sudden deprivation of circulating blood. The main change is necrosis (death) of myocardial tissue. The word “infarction” comes from the Latin “infarcire” meaning “to plug up or cram.” It […]
- Myocardial infarction, acute
Acute myocardial infarction.
- Myocarditis
Inflammation of the myocardium, the heart muscle. Myocarditis can be caused by a number of different conditions. The most common cause is infection of the heart muscle by a virus. The virus causes the initial heart muscle inflammation. After the initial viral infection subsides, the body’s immune system continues to inflict inflammatory damage on the […]