| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
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| A/P | abdominal/perineal; antepartum; ascites/plasma [ratio] |
| AT | abdominal thrusts; achievement test; Achilles tendon; Achard-Thiers [syndrome]; adaptive thermogenes... |
| ATI | abdominal trauma index |
| AXR | abdominal x-ray [examination] |
| Heyns' abdominal decompression apparatus | A vacuum chamber enclosing the abdomen of the pregnant woman, creating pressure during the first stage of labour. (05 Mar 2000) |
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| secondary abdominal pregnancy | A condition in which the embryo or foetus continues to grow in the abdominal cavity after its expulsion from the fallopian tube or other seat of its primary development. Synonym: abdominocyesis. (05 Mar 2000) |
| hysterectomy, abdominal | Surgical removal of the uterus through an incision made in the abdominal wall. As opposed to a vaginal hysterectomy. (12 Dec 1998) |
| deep abdominal reflexes | Contraction of abdominal muscles elicited by stimulation, such as tapping a deep structure; e.g., the costal margin. See: Galant's reflex, upper abdominal periosteal reflex. (05 Mar 2000) |
| diffuse abdominal calcification | <radiology> Ovarian cystadenocarcinoma (psammomatous Calcium), pseudomyxoma peritonei, pseudomucinous cystadenoma of ovary, mucocele of appendix, undifferentiated abdominal malignancy, TB peritonitis, oil granulomata, meconium peritonitis (12 Dec 1998) |
| intra-abdominal | Within the abdomen. (05 Mar 2000) |
| intra-abdominal abscess | <surgery> A localised pus-forming (suppurative) bacterial infection that occurs within the abdominal cavity as the result of a perforated viscus or post operative complication. Treatment requires either percutaneous or open surgical drainage. (27 Sep 1997) |
| intra-abdominal calcifications | <radiology> Urinary, kidneys, ureters, prostate, seminal vesicles, biliary, gallstones (15% radiopaque), milk of calcium bile, porcelain gall bladder, pancreatic, vascular, lymph nodes, neoplastic, psammomatous calcification (especially mucinous adenocarcinoma), miscellaneous, appendiceal mucocele, appendicolith, ovarian teratoma, haematoma, injection granuloma (12 Dec 1998) |
| extra-abdominal desmoid | A deep-seated firm tumour, most frequently occurring on the shoulders, chest, or back of young men or women, consisting of collagenous fibrous tissue that infiltrates surrounding muscle; frequently recurs but does not metastasize. (05 Mar 2000) |
| undifferentiated abdominal malignancy | <radiology> Large soft-tissue masses, multiple linear or nodular calcific densities, can coalesce to form conglomerate masses (12 Dec 1998) |
| upper abdominal periosteal reflex | Percussing the lower margin of the costal cartilages in the nipple line causes a contraction of the ipsilateral abdominal muscles (inconstant). (05 Mar 2000) |
| fibromatosis, abdominal | A relatively large mass of unusually firm scarlike connective tissue resulting from active participation of fibroblasts, occurring most frequently in the abdominal muscles of women who have borne children. The fibroblasts infiltrate surrounding muscle and fascia. (12 Dec 1998) |
| lower abdominal periosteal reflex | A deep abdominal reflex in which there is a contraction of the abdominal muscles on tapping the anterior superior iliac spine. Synonym: lower abdominal periosteal reflex. (05 Mar 2000) |
| lymph nodes of abdominal organs | The numerous lymph nodes receiving lymph from abdominal organs located in association with the visceral branches of the aorta. Synonym: nodi lymphatici abdominis viscerales. (05 Mar 2000) |
| acute transverse myelitis | Acute inflammation and softening of the spinal cord; involves the entire thickness of the spinal cord but of limited longitudinal extent; multiple aetiologies. (05 Mar 2000) |