| LAS | laboratory automation system; lateral amyotrophic sclerosis; laxative abuse syndrome; left anterior-... |
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| LASH | left anterior superior hemiblock |
| LSR | lanthanide shift reagent; lecithin/ sphingomyelin ratio; left superior rectus [muscle]; liver/spleen... |
| LSVC | left superior vena cava |
| MSO | management service organization; medial superior olive; medical staff organization |
| bulb of jugular vein | <anatomy, vein> One of two dilated parts of the internal jugular vein: the superior bulb (Heister's diverticulum) is a dilation at the beginning of the internal jugular vein in the jugular fossa of the temporal bone; the inferior bulb is a dilat ed portion of the vein just before it reaches the brachiocephalic vein. Synonym: jugular bulb, bulbus venae jugularis. (05 Mar 2000) |
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| Burow's vein | <anatomy, vein> An occasional vein passing from the inferior epigastric, sometimes receiving a tributary from the urinary bladder, which empties into the portal vein, one of the renal veins. (05 Mar 2000) |
| capillary vein | <zoology> A small vein; a veinlet; specifically, one of the small branches of the veins of the wings in insects. Origin: L. Venula, dim. From vena vein. Source: Websters Dictionary (01 Mar 1998) |
| palatine vein | <anatomy, vein> Drains the palatine regions and empties into the facial vein. Synonym: vena palatina. (05 Mar 2000) |
| varicose vein | <anatomy, surgery> An abnormal swelling and tortuosity especially of the superficial veins of the legs. (18 Nov 1997) |
| Gartner's vein phenomenon | Fullness of the veins of the arm and hand held below heart level and collapse at a certain variable distance above that level. (05 Mar 2000) |
| vein | 1. Blood vessel that returns blood from the microvasculature to the heart, walls thinner and less elastic than those of artery. 2. In leaves, thickened portion of leaf containing vascular bundle, the pattern, venation, is characteristic for each species. (18 Nov 1997) |
| vein of bulb of penis | A tributary of the internal pudendal vein that drains the bulb of the penis. Synonym: vena bulbi penis. (05 Mar 2000) |
| vein of cochlear aqueduct | It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. (05 Mar 2000) |
| vein of cochlear canaliculus | It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. (05 Mar 2000) |
| vein of corpus striatum | <anatomy, vein> A long vein passing forward in the groove between the thalamus and caudate nucleus, covered by the lamina affixa, receiving the transverse caudate veins along its lateral side, and joining at the caudal wall of Monro's foramen with the choroidal vein and vein of septum pellucidum to form the internal cerebral vein. Synonym: vena terminalis, vena thalamostriata superior, terminal vein, vein of corpus striatum. (05 Mar 2000) |
| vein of galen aneurysm | <radiology> Really AVM, not aneurysm, AVM of posterior choroidal branches of PCA, with or without congestive heart failure due to AV shunting (left to right), predominantly right-sided cardiomegaly, wide superior mediastinum, retrosternal fullness, cervical trachea displaced anteriorly (12 Dec 1998) |
| vein of lateral recess of fourth ventricle | A small vein originating in the cerebellar tonsil, coursing by the lateral recess of the fourth ventricle on its way to terminate in the petrosal vein. Synonym: vein of lateral recess of fourth ventricle. (05 Mar 2000) |
| vein of olfactory gyrus | A tributary of the basal vein which drains the medial olfactory stria. Synonym: vein of olfactory gyrus. (05 Mar 2000) |
| vein of posterior horn | A small vein draining the surface region of the posterior horn of the lateral ventricle; it is a tributary to the great cerebral vein. Synonym: vein of posterior horn. (05 Mar 2000) |