| LAC | La Crosse [virus]; lactase; left atrial circumflex [artery]; left atrial contraction; linguoaxiocerv... |
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| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
| LCA | left circumflex artery; left coronary artery; leukocyte common antigen; lithocholic acid; lymphocyte... |
| LMC | large motile cell; lateral motor column; left main coronary [artery]; left middle cerebral [artery];... |
| LMCA | left main coronary artery; left middle cerebral artery |
| segmental bronchus | One of the divisions of the lobar bronchus that supplies a bronchopulmonary segment. In the right lung there are commonly ten: in the superior lobe, the apical (B1) segmental bronchus, bronchus segmentalis apicalis; posterior (B2) segmental bronchus, bronchus segmentalis (BII) posterior; and anterior (B3) segmental bronchus, bronchus segmentalis (BIII) anterior; in the middle lobe, lateral (B4) segmental bronchus, bronchus segmentalis (BIV) lateralis; and medial (B5) segmental bronchus, bronchus segmentalis medialis (BV); in the inferior lobe, superior (B6) segmental bronchus, bronchus segmentalis superior (BVI), medial basal (B7) segmental bronchus, bronchus segmentalis basalis medialis (BVII); anterior basal (B8) segmental bronchus, bronchus segmentalis basalis anterior (BVIII); lateral basal (B9) segmental bronchus, bronchus segmentalis basalis lateralis (BIX); and posterior basal (B10) segmental bronchus, bronchus segmentalis basalis posterior (BX). In the left lung there are commonly nine: in the superior lobe, the apicoposterior (B1+2) segmental bronchus, bronchus segmentalis apicoposterior (BI+I); anterior (B3) segmental bronchus, bronchus segmentalis anterior (BIII); superior lingular (B4) segmental bronchus, bronchus lingularis superior (BIV); and inferior lingular (B5) segmental bronchus, bronchus lingularis inferior (BV); in the inferior lobe, superior (B6) segmental bronchus, bronchus segmentalis superior (BVI); medial basal (B7) segmental bronchus, bronchus segmentalis basalis medialis (cardiacus) (BVII), anterior basal (B8) segmental bronchus, bronchus segmentalis basalis anterior (BVIII); lateral basal (B9) segmental bronchus, bronchus segmentalis basalis lateralis (BIX); and posterior basal (B10) segmental bronchus, bronchus segmentalis basalis posterior (BX). Synonym: bronchus segmentalis. (05 Mar 2000) |
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| segmental demyelinating polyneuropathy | A type of polyneuropathy in which almost solely the peripheral nerve myelin is affected; can be both familial (e.g., Charcot-Marie Tooth disease, type 1), or acquired (e.g., Guillain-Barre syndrome); on motor nerve conduction studies, manifested as conduction slowing or block. Synonym: segmental demyelinating polyneuropathy. (05 Mar 2000) |
| segmental fracture | A fracture in two parts of the same bone. Synonym: double fracture. (05 Mar 2000) |
| segmental glomerulonephritis | Glomerulonephritis affecting only part of a glomerulus or glomeruli. Synonym: local glomerulonephritis. (05 Mar 2000) |
| segmental glomerulosclerosis | <nephrology> A kidney disorder that results in fibrosis and scarring in the kidney glomerulus. The cause is unknown but some cases can result from reflux nephropathy. The clinical manifestation of this kidney disorder is nephrotic syndrome. Symptoms include weight gain, swelling, hypertension and foamy urine. High blood cholesterol and triglyceride levels are also seen with this disorder. Treatment has included the use of corticosteroids and immunosuppressives. Antihypertensive agents and diuretics may also be necessary. Over one-half will develop chronic renal failure within 10 years of diagnosis. (27 Sep 1997) |
| segmental mastectomy | <procedure, surgery> A surgical procedure in which only a portion of the breast is removed, including the cancer and the surrounding margin of healthy breast tissue. (09 Oct 1997) |
| segmental neuritis | Inflammation occurring at several points along the course of a nerve, segmental demyelinating neuropathy (05 Mar 2000) |
| segmental plate | In a young embryo, the thickened dorsal portion of the undifferentiated paraxial mesoderm which becomes metamerically divided to form the mesodermal somites. Synonym: segmental plate. (05 Mar 2000) |
| segmental sphincter | A sphincter of a segment of an organ, a tube, or a canal, and longer than an annular sphincter. (05 Mar 2000) |
| segmental tubule | An excretory tubule of the mesonephros. Synonym: segmental tubule. (05 Mar 2000) |
| segmental zone | In a young embryo, the thickened dorsal portion of the undifferentiated paraxial mesoderm which becomes metamerically divided to form the mesodermal somites. Synonym: segmental plate. (05 Mar 2000) |
| focal and segmental hyalinosis | <nephrology> A kidney disorder that results in fibrosis and scarring in the kidney glomerulus. The cause is unknown but some cases can result from reflux nephropathy. The clinical manifestation of this kidney disorder is nephrotic syndrome. Symptoms include weight gain, swelling, hypertension and foamy urine. High blood cholesterol and triglyceride levels are also seen with this disorder. Treatment has included the use of corticosteroids and immunosuppressives. Antihypertensive agents and diuretics may also be necessary. Over one-half will develop chronic renal failure within 10 years of diagnosis. (27 Sep 1997) |
| focal segmental glomerulosclerosis | <nephrology> A kidney disorder that results in fibrosis and scarring in the kidney glomerulus. The cause is unknown but some cases can result from reflux nephropathy. The clinical manifestation of this kidney disorder is nephrotic syndrome. Symptoms include weight gain, swelling, hypertension and foamy urine. High blood cholesterol and triglyceride levels are also seen with this disorder. Treatment has included the use of corticosteroids and immunosuppressives. Antihypertensive agents and diuretics may also be necessary. Over one-half will develop chronic renal failure within 10 years of diagnosis. (27 Sep 1997) |
| artery of posterior segment of kidney | Origin, continuation of the posterior branch of renal. See: segmental arteries of kidney. Synonym: arteria segmenti posterioris renis, artery of posterior segment of kidney. (05 Mar 2000) |
| mastoid branches of posterior auricular artery | <anatomy, artery> Branches from stylomastoid branch of posterior auricular artery arising within the facial canal, distributed to the mastoid air cells. Synonym: rami mastoidei arteriae auricularis posterioris. (05 Mar 2000) |