| 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) |
| alveolar bone | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| alveolar bone loss | The resorption of bone in the supporting structures of the maxilla or mandible as a result of periodontal disease. (12 Dec 1998) |