| OTC | ornithine transcarbamylase; oval target cell; over-the-counter; oxytetracycline |
|---|---|
| PTV | planning target volume; posterior tibial vein |
| PTV2 | planning target volume 2 |
| STAG | slow-target attaching globulin; split-thickness autogenous graft |
| TAG | target attaching globulin; technical advisory group; thymine, adenine, and guanine |
| TBC | target binding cells |
|---|---|
| TC | target cell |
| TOR | target of rapamycin |
| Bird's sign | <clinical sign> The presence of a zone of dullness on percussion with absence of respiratory sign's in hydatid cyst of the lung. (05 Mar 2000) |
|---|---|
| Bjerrum's sign | A comet-shaped scotoma, occurring in glaucoma, attached at the temporal end to the blind spot or separated from it by a narrow gap; the defect widens as it extends above and nasally curves around the fixation spot, and then extends downward to end exactly at the nasal horizontal meridian. Synonym: Bjerrum's sign, sickle scotoma. (05 Mar 2000) |
| blueberry muffin sign | <radiology> Raised, purple skin lesions, dermal metastases of neuroblastoma (stage IV-S) (12 Dec 1998) |
| blue dot sign | <clinical sign> A blue or black spot visible beneath the skin on the cranial aspect of testis or epididymis. This is a torsed testicular appendage and is usually quite tender. (05 Mar 2000) |
| Blumberg's sign | <clinical sign> Pain felt upon sudden release of steadily applied pressure on a suspected area of the abdomen, indicative of peritonitis. (05 Mar 2000) |
| Bonhoeffer's sign | <clinical sign> Loss of normal muscle tone in chorea. (05 Mar 2000) |
| Bozzolo's sign | <clinical sign> Pulsating vessels in the nasal mucous membrane, noted occasionally in thoracic aneurysm. (05 Mar 2000) |
| Branham's sign | <clinical sign> Bradycardia following compression or excision of an arteriovenous fistula. (05 Mar 2000) |
| Braxton Hicks sign | <clinical sign> Irregular uterine contractions occurring after the third month of pregnancy. (05 Mar 2000) |
| Broadbent's sign | <clinical sign> A retraction of the thoracic wall, synchronous with cardiac systole, visible anywhere, but particularly in the left posterior axillary line; a sign of adherent pericardium. (05 Mar 2000) |
| Brockenbrough sign | <clinical sign> Absolute decrease in pulse pressure of the beat immediately following a premature beat; a sign of idiopathic hypertrophic subaortic stenosis. (05 Mar 2000) |
| Brudzinski's sign | <clinical sign> A physical examination finding that can indicate inflammation of the meninges (meningitis), performed in two forms: passive flexion of one leg results in a similar movement on the opposite side or if the neck is passively flexed, flexion occurs in the legs. (27 Sep 1997) |
| Bryant's sign | <clinical sign> In dislocation of the shoulder, an abnormal position of axillary folds occurs. (05 Mar 2000) |
| burning drops sign | <clinical sign> In certain cases of perforated gastric ulcer, a sensation as of drops of hot liquid falling into the abdominal cavity or as of a stream of intensely hot liquid being poured into the cavity. (05 Mar 2000) |
| calcium sign | In chest radiography, displacement of the line of the calcified intima of the aorta away from its outer wall, a finding in a small percentage of cases of dissection of blood in the aortic media; the expression "displaced intimal calcification" is preferred to the listed term. See: aortic dissection. (05 Mar 2000) |