Major anxiety disorder
panic disorder;
obsessive-compulsive disorder;
PTSD (post-traumatic stress disorder);
social phobia;
specific phobias such as claustrophobia; and
generalized anxiety disorder.
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- Major depression
A disease with certain characteristic signs and symptoms that interferes with the ability to work, sleep, eat, and enjoy once pleasurable activities. The characteristic signs and symptoms of major depression include loss of interest in activities that were once interesting or enjoyable, including sex; loss of appetite (anorexia) with weight loss or overeating with weight […]
- Major gene
A gene that is necessary and sufficient by itself to cause a condition. For example, the APC gene is a major gene for colorectal cancer.
- Major histocompatibility complex
Abbreviated MHC. A cluster of genes located on chromosome 6 concerned with antigen production and critical to the success of transplantation. The MHC includes the human leukocyte antigen (HLA) genes.
- Malabsorption
Poor intestinal absorption of nutrients. Malabsorption can occur from diseases that injure the bowels, such as Crohn’s disease, Whipple’s disease, celiac disease, and many others.
- Malacia
Softening. For example, osteomalacia is softening of bone, usually due to deficiency of calcium and vitamin D.