| BMT | Bachelor of Medical Technology; basement membrane thickening; benign mesenchymal tumor; bone marrow ... |
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| BRA | bilateral renal agenesis; bone-resorbing activity; brain-reactive antibody |
| BRF | bone-resorbing factor |
| BRU | bone remodeling unit |
| CaBI | calcium bone index |
| Klestadt's cyst | A soft tissue cyst located near the attachment of the ala over the maxilla; probably derived from the lower anterior part of the nasolacrimal duct. Synonym: Klestadt's cyst, nasolabial cyst. (05 Mar 2000) |
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| urachal cyst | Cyst occurring in a persistent portion of the urachus, presenting as an extraperitoneal mass in the umbilical region. It is characterised by abdominal pain, and fever if infected. It may rupture, leading to peritonitis, or it may drain through the umbilicus. (12 Dec 1998) |
| urinary cyst | A cyst containing extravasated urine. (05 Mar 2000) |
| utricular cyst | Dilatation of the utricular lumen; usually unilocular. (05 Mar 2000) |
| fissural cyst | A cyst derived from epithelial remnants entrapped along the fusion line of embryonal processes. Synonym: inclusion cyst. (05 Mar 2000) |
| lacteal cyst | A retention cyst in the mammary gland resulting from closure of a lactiferous duct. Synonym: milk cyst. (05 Mar 2000) |
| follicular cyst | <physiology> Cyst due to the occlusion of the duct of a follicle or small gland. (12 Dec 1998) |
| lateral periodontal cyst | An intraosseous cyst, usually encountered in the cuspid-premolar region of the mandible, derived from the remnants of the dental lamina and representing the intraosseous counterpart of the gingival cyst. (05 Mar 2000) |
| leptomeningeal cyst | <radiology> Growing skull fracture, trauma most likely to be , skull fracture with tear of dura, herniation of fluid-filled arachnoid tissue, cyst walled off by subarchnoid adhesions, XR: oval area of bony erosion with scalloped margins, may result in acquired encephalocele (12 Dec 1998) |
| liver cyst | <radiology> Simple cyst, polycystic liver disease (50% most likely to be renal cysts), abscess (pyogenic, amebic, hydatid), traumatic haematoma, Caroli disease, cystic hepatoblastoma, cystadenoma / cystadenocarcinoma, haemangioendothelioma, cystic metastasis (uncommon): sarcoma, melanoma, ovarian cystadenocarcinoma (12 Dec 1998) |
| lymphoepithelial cyst | A cervical cyst arising from salivary gland epithelium entrapped in lymph nodes during embryogenesis. Also seen within the oral cavity. (05 Mar 2000) |
| 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) |