AP (anteroposterior): In anatomy, AP stands for anteroposterior: from front-to-back. For example, an AP X-ray of the chest is taken from front-to-back.
AP in this respect is the opposite of PA, which stands for posteroanterior: from back-to-front.
- AP, X-ray
AP, X-ray: An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front.
APA: 1. American Psychiatric Association. 2. American Psychological Association. 3. American Podiatry Association. 4. Antiphospholipid antibody. 5. Alkaline phosphatase activity.
APC: APC has several very different meanings in medicine. See each of the following separate entries: 1. APC (gene). 2. APC (immunology). 3. APC (medication).
- APC (gene)
APC (gene): A major gene that is involved in causing colorectal cancer. APC is involved in both sporadic and familial forms of colorectal cancer. A mutation in the APC gene is the earliest detectable molecular abnormality in colorectal cancer. This mutation imitates the neoplastic process 20 to 30 years before the malignancy itself is full-blown. […]
- APC (immunology)
APC (immunology): Antigen-presenting cell, a cell that can “present” antigen in a form that T cells can recognize it. Among the APCs are B cells and cells of the monocyte lineage including macrophages.