| pathologic retraction ring | A constriction located at the junction of the thinned lower uterine segment with the thick retracted upper uterine segment, resulting from obstructed labour; this is one of the classic signs of threatened rupture of the uterus. Synonym: Bandl's ring, Baudelocque's uterine circle, Scanzoni's second os. (05 Mar 2000) |
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| pathologic rigidity | Rigidity of the cervix uteri in labour, due to fibrosis, scarring, cancer, or other condition. (05 Mar 2000) |
| pathologic sphincter | A thickening of circular musculature caused by disease. (05 Mar 2000) |
| pathologic startle syndromes | A group of disorders characterised by markedly exaggerated startle reflex and other exaggerated stimulus-induced responses. Includes hyperexplexia and probably latah and the jumping Frenchman of Maine syndrome. (05 Mar 2000) |
| constriction, pathologic | The condition of an anatomical structure's being constricted beyond normal dimensions. (12 Dec 1998) |
| neovascularization, pathologic | Proliferation of blood vessels in tissue not normally containing them, or proliferation of blood vessels of a different kind than usual in tissue. It includes angiogenesis in tumour growth, diabetic retinopathy, haemangiomas, arthritis, and psoriasis. (12 Dec 1998) |
| decalcification, pathologic | The loss of calcium salts from bones and teeth. Bacteria may be responsible for this occurrence in teeth. Old age may be a factor contributing to calcium loss, as is the presence of diseases such as rheumatoid arthritis. (12 Dec 1998) |
| diagnosis, pathologic | A diagnosis, sometimes made postmortem on the basis of the study of tissue and/or organs. (27 Sep 1997) |
| dilatation, pathologic | The condition of an anatomical structure's being dilated beyond normal dimensions. (12 Dec 1998) |
| bone within a bone | <radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D (12 Dec 1998) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| air-bone gap | The difference between the threshold for hearing acuity by bone conduction and by air conduction. (05 Mar 2000) |
| Albrecht's bone | A small bone between the basioccipital and basisphenoid. (05 Mar 2000) |
| allogeneic bone marrow transplant | <haematology, procedure> A bone marrow transplant using marrow collected from a matched healthy donor, usually a brother or sister. The risks associated with the transplant increase with age and 50 years of age is generally regarded as the upper limit. (13 Nov 1997) |
| alveolar bone | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |