| small sciatic nerve | <anatomy, nerve> Arises from the first three sacral nerves, supplies the skin of the posterior surface of the thigh and of the popliteal region (S1 and S2 component); it gives off a perineal branch (S3 component) that passes to the lateral aspect of the scrotum or labia majora. Synonym: nervus cutaneus femoris posterior, posterior cutaneous nerve of thigh, small sciatic nerve. (05 Mar 2000) |
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| small trochanter | A pyramidal process projecting from the medial and proximal part of the shaft of the femur at the line of junction of the shaft and the neck; it receives the insertion of the psoas major and iliacus (iliopsoas) muscles. Synonym: trochanter minor, small trochanter, trochantin. (05 Mar 2000) |
| small uterus | <radiology> Hypoplasia, nulliparity, di-ethyl stilbesterol (DES), synechiae (12 Dec 1998) |
| small vein | <anatomy, vein> A vein in which the three tunics are poorly defined and thin; longitudinal elastic networks occur and the smooth muscle of the media, which is circularly arranged, may be incomplete or in one or two layers. (05 Mar 2000) |
| nasal venous arch | An arch formed at the root of the nose by the two supratrochlear veins connected by a transverse vein. (05 Mar 2000) |
| neonatal pulmonary venous hypertension | <radiology> With cardiomegaly, hypoplastic left heart, critical aortic stenosis, cor triatriatum, pulmonary venous atresia, normal heart size, infradiaphragmatic TAPVR (12 Dec 1998) |
| suboccipital venous plexus | The extensive plexus of veins in the suboccipital region. Synonym: plexus venosus suboccipitalis. (05 Mar 2000) |
| superficial palmar venous arch | The venous arch accompanying the superficial palmar arterial arch it consists usually of paired venae comitantes and is drained by the superficial ulnar and radial veins. Synonym: arcus venosus palmaris superficialis. (05 Mar 2000) |
| deep palmar venous arch | The venous arch that accompanies the deep palmar arterial arch it usually consists of paired venae comitantes. Synonym: arcus venosus palmaris profundus. (05 Mar 2000) |
| deep venous thrombosis | <cardiology> A blood clot that forms in a vein resulting in obstruction of venous flow. most common clinically in the lower extremities. (27 Sep 1997) |
| systemic venous hypertension | Increased pressure in the veins ultimately leading to the right atrium nearly always due to disease of the right heart but occasionally due to blockade of one or both venae cavae. (05 Mar 2000) |
| diffuse small bowel disease | <radiology> SWELL GAMES, S sprue, dilatation, dilution, moulage, reversal of jejunal and ileal patterns, W Whipple disease, coarse nodular and irregular mucosa, E oedema, L lymphangiectasis, nodular, thickened folds, L lymphoma, nodular, thickened folds, G giardiasis, oedema and spasm of proximal small bowel, A amyloid, symmetric fold thickening, M mastocytosis, look for sclerotic bones, E eosinophilic gastroenteritis, thickened, nodular folds and spasm, S stasis syndromes see: small bowel disease (12 Dec 1998) |
| diffuse small cleaved cell lymphoma | <tumour> A diffuse poorly differentiated lymphocytic lymphoma; follicular centre cell lymphoma that lacks a follicular pattern; malignancy is of intermediate grade. (05 Mar 2000) |
| dorsal venous arch of foot | The arch in the subcutaneous tissue of the dorsum of the foot formed by the dorsal and digital veins; it unites medially with the dorsal vein of the great toe to form the great saphenous vein, and laterally with the dorsal vein of the little toe to form the small saphenous. Synonym: arcus venosus dorsalis pedis. (05 Mar 2000) |
| dorsal venous network of foot | A superficial network of fine veins on the dorsum of the foot. Synonym: rete venosum dorsale pedis. (05 Mar 2000) |