Dictionary of Medical Acronyms & Abbreviations

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[ L ]

L₁ | L₂ | L₃ | L₄ | L₅ | L₆ |

LPI left posterior-inferior; lysinuric protein intolerance
LPIFB left posteroinferior fascicular block
LPIH left posteroinferior hemiblock
LPK liver pyruvate kinase
LPL lethal-potentially-lethal; lichen planus-like lesion; lipoprotein lipase; local probability of lesion
LPLA lipoprotein lipase activity
LPM lateral pterygoid muscle; leverage and parallelepiped mechanism [computer-assisted surgery]; liver plasma membrane
Lpm lines per minute; liters per minute
Lp/mm line pairs per millimeter
LPN Licensed Practical Nurse
LPO lactoperoxidase; left posterior oblique; light perception only; lipid peroxidation
LPP large plaque parapsoriasis; lateral pterygoid plate
LPPH late postpartum hemorrhage
LPR lactate-pyruvate ratio; late phase reaction
Lpro longitudinal prospective [trial]
LPS lateral premotor system; levator palpebrae superioris [muscle]; linear profile scan; link power status; lipase; lipopolysaccharide; Lovastatin Pravastatin Study
Lps liters per second
LPSR lipopolysaccharide receptor
LPT Language Proficiency Test; lipotropin
LPTP Laboratory Proficiency Test Program [Canada]
LPV lapine parvovirus; left portal view; left pulmonary veins; lopinavir
LPVP left posterior ventricular preexcitation
LPW lateral pharyngeal wall
Lpw lumens per watt
LPX, Lp-X lipoprotein-X
LPyV lymphotropic polyomavirus
LQ linear quadratic; longevity quotient; lordosis quotient; lower quadrant
LQS Lexicon Query Service Specifications
LQT long QT [syndrome]
LQTS long QT syndrome
LR labeled release; laboratory references; laboratory report; labor room; lactated Ringer's [solution]; large reticulocyte; latency reaction; latency relaxation; lateral rectus [muscle]; lateral retinaculum; left hand; left-handed [person]; left rotation; level of recommendation; level of risk; light reaction; light reflex; likelihood ratio; limb reduction [defect]; limit of reaction; livedo reticularis; local recurrence; logistic regression; low renin; lymphocyte recruitment
L-R left to right
L/R left-to-right [ratio]
LR[+] positive likelihood ratio
LR[-] negative likelihood ratio
L&R left and right
Lr lawrencium; limes reacting dose [the least amount of toxin which will produce a reaction]
L_r limes reacting dose [the least amount of toxin which will produce a reaction]
LRA local relevance aggregation [algorithm for insulin therapy]; low right atrium
LRC learning resource center; lipid research clinic; lower rib cage
LRC-CDPT Lipid Research Clinics Coronary Drug Project Trial
LRC-CPPT Lipid Research Clinics Coronary Primary Prevention Trial
LRCMB Laboratory of Retinal Cell and Molecular Biology
LRC-MFS Lipid Research Clinics Mortality Follow-Up Study
LRCP Licentiate of the Royal College of Physicians; low-risk chest pain
LRCS Licentiate of the Royal College of Surgeons
LRCSE Licentiate of the Royal College of Surgeons, Edinburgh
LRD living related donor
LRDT living related donor transplant
LRE lamina rara externa; leukemic reticuloendotheliosis; lymphoreticuloendothelial
LREC language resources and evaluation
LREH low renin essential hypertension
LRES long-range evaluation system
LRes limited resuscitation
Lretro longitudinal retrospective [trial]
LRF latex and resorcinol formaldehyde; liver residue factor; luteinizing hormone-releasing factor
LRG leucine-rich glycoprotein
LRH likelihood ratio for heterogeneity; luteinizing hormone-releasing hormone
LRI lamina rara interna; lower respiratory [tract] illness; lower respiratory [tract] infection; lymphocyte reactivity index
LRL lower [heart] rate limit
LRLT living-related donor transplantation
LRM left radical mastectomy; logistic regression model
LRMP last regular menstrual period
LRN Laboratory Response Network; lateral reticular nucleus
LROP lower radicular obstetrical paralysis
LRP lichen ruber planus; linear resolution pattern; lipoprotein receptor-related protein; long-range planning
LRPC Long Range Planning Committee [National Cancer Institute]
Lr-PET low resolution positron emission tomography
LRQ lower right quadrant
LRR labyrinthine righting reflex; leucine-rich repeat; light reflection rheography; local regional recurrence; lymph return rate
LRS laboratory results; lactated Ringer solution; lateral recess stenosis; lateral recess syndrome; low rate of stimulation; lumboradicular syndrome
LRSDS long range standoff detection system
LRSF lactating rat serum factor; liver regenerating serum factor
LRSS late respiratory systemic syndrome
LRT lateral reticular nucleus; living related transplant; local radiation therapy; long terminal repeat; Lovastatin Restenosis Trial; lower respiratory tract
LRTI lower respiratory tract illness; lower respiratory tract infection
LRV Lato River virus; left renal vein; Leishmania RNA virus
LS lateral septum; lateral suspensor; leader sequence; learning system; least; left sacrum; left septum; left side; legally separated; Leigh syndrome; leiomyosarcoma; length of stay; Leriche syndrome; Letterer-Siwe [disease]; Licentiate in Surgery; life sciences; light scanning; light scattering [technique]; light-sensitive, light sensitivity; light sensor; light sleep; Likert score; liminal sensation; linear scanning; linear scleroderma; lipid synthesis; liver and spleen; long sleep; longitudinal section; longitudinal study; Lowe syndrome; low-sodium [diet]; lower strength; lumbar spine; lumbosacral; lung surfactant; lymphosarcoma
L-S Letterer-Siwe [disease]; lipid-saccharide
L:S lecithin:sphingomyelin [ratio]
L/S lactase/sucrase [ratio]; lecithin/ sphingomyelin [ratio]; lipid/saccharide [ratio]; longitudinal section; lumbosacral
L&S liver and spleen
LSA left sacro-anterior [fetal position]; left subclavian artery; leukocyte-specific activity; lichen sclerosus et atrophicus; lymphosarcoma
LS&A lichen sclerosus et atrophicus
LSAH Longitudinal Study of Astronaut Health
LSANA leukocyte-specific antinuclear antibody
LSA/RCS lymphosarcoma-reticulum cell sarcoma
LSB least significant bit; left sternal border; left scapular border; long spike burst; lower sternal border; lumbar sympathetic block
LSBE low-segment Barrett's esophagus
LS-BMD lumbar spine bone mineral density
LSC last sexual contact; late systolic click; least significant change; left side colon cancer; left subclavian; lichen simplex chronicus; liquid scintillation counting; liquid-solid chromatography; locus subcoeruleus
LSc local scleroderma
LScA left scapulo-anterior [fetal position]
LSCL lymphosarcoma cell leukemia
LSCM laser scanning confocal microscopy
LScP left scapulo-posterior [fetal position]
LSCS lower segment cesarean section
LSCT lung cancer screening test
LSCVP left subclavian central venous pressure
LSD laryngeal sound discrimination; least significant difference; least significant digit; low-sodium diet; lysergic acid diethylamide
LSD-25 lysergic acid diethylamide
LSDIS large scale distributed information system
LSE least squares error; left sternal edge
LSect longitudinal section
LSEP left somatosensory evoked potential; lumbosacral somatosensory evoked potential
LSER linear solvation energy relationship
LSF linear spread function; low saturated fat; lymphocyte-stimulating factor
LSFB least squares forward backward
LSG labial salivary gland; losigamone
LSGP leukocyte sialoglycoprotein
LSH lutein-stimulating hormone; lymphocyte-stimulating hormone
LSHTM London School of Hygiene and Tropical Medicine
LSI large-scale integration; latent semantic indexing; life satisfaction index; List of Serials Indexed [NLM]; lumbar spine index
LSIL low-grade intraepithelial lesion
LSK liver, spleen, kidneys
LSKM liver-spleen-kidney-megaly
LSL left sacrolateral [fetal position]; left short leg; lymphosarcoma [cell] leukemia
LSM laser scanning microscopy; late systolic murmur; least square mean; least square matching [algorithm]; lymphocyte separation medium; lysergic acid morpholide
LSN large scale networking; left substantia nigra
LSNWG Large Scale Networking Working Group
LSO lateral superior olive; left salpingo-oophorectomy; left superior oblique; lumbosacral orthosis
LSP left sacroposterior [fetal position]; linguistic string project; liver-specific protein; lymphocyte-specific protein
LSp life span
LS PACS low-speed picture archive and communication system
L-Spar asparaginase (Elspar)
LSP-MLP linguistic string project-medical language processor
LSPV left superior pulmonary vein
LSR lanthanide shift reagent; lecithin/ sphingomyelin ratio; left superior rectus [muscle]; liver/spleen ratio
LSRA low septal right atrium
LSRO Life Sciences Research Office
LSS latest starting shift; Life Span Study; life support station; liver-spleen scan; lumbar spinal stenosis; lumbosacral spine
LSSA lipid-soluble secondary antioxidant
LS-SEDUHS Longitudinal Study on Socio-Economic Differences in Utilization of Health Services
LS-SEHD Longitudinal Study on Socio-Economic Health Differences
LSSP-PCR low-stringency single specific primer polymerase chain reaction
LST lateral spinothalamic tract; lateral spreading tumor; left sacrotransverse [fetal position]; life-sustaining treatment
LSTAT life support for trauma and transport
LSTL laparoscopic tubal ligation
LSU lactose-saccharose-urea [agar]; life support unit
LSV lateral sacral vein; left subclavian vein; lesser saphenous vein; Lone Star virus; longitudinal sound velocity
LSVC left superior vena cava
LSVT large scale vocabulary test; left saphenous vein thrombophlebitis
LSWA large amplitude slow wave activity
LT heat-labile toxin; laboratory technology/technologist; laminar tomography; Laplace transform; left; left thigh; left thoracic; less than; lethal time; leukotriene; Levin tube; levothyroxine; light; line termination; long-term; low temperature; lumbar traction; lymphocytic thyroiditis; lymphocytotoxin; lymphotoxin; syphilis [lues] test
L-T3 L-triiodothyronine
L-T4 L-thyroxine
Lt left; light; low tension
LTA leukotriene A; lipoate transacetylase; lipotechoic acid; local tracheal anesthesia; long-term archives; lost-time accident
L-TAP Lipid Treatment Assessment Project
LTAS lead tetra-acetate Schiff
LTB larparoscopic tubal banding; laryngotracheobronchitis; leukotriene B
LTBI latent tuberculosis infection
LTC large transformed cell; leukotriene C; lidocaine tissue concentration; long-term care; lysed tumor cell
L1TC level 1 trauma center
LTCF long-term care facility
LTCIC, LTC-IC long-term culture-initiating cell
LTCS low transverse cervical section
LTD Laron-type dwarfism; laterodorsal tegmental [nucleus]; leukotriene D; long-term [cortical] depression; long-term disability
LTE laryngotracheoesophageal; leukotriene E
LT-ECG long-term electrocardiography
LTF lactotransferrin; lateral tegmental field; lipotropic factor; lymphocyte-transforming factor
LTFU lost to follow-up
LTG lamotrigine; long-term goal; low-tension glaucoma
LTH lactogenic hormone; local tumor hyperthermia; low temperature holding; luteotropic hormone
LTI lupus-type inclusions
LTK laser thermokeratoplasty; leukocyte tyrosine kinase
Lt lat left lateral
LTLT low-temperature, long-time [pasteurization]
LTM long-term memory
LTN lateral telangiectatic nevus
LTNP long-term non-progressor
LTO₂ long-term oxygen therapy
LTOT long-term oxygen therapy
LTP laryngotracheoplasty; lateral thigh perforator; Learning Technologies Project; leukocyte thromboplastin; lipid transfer protein; long-term potentiation; L-tryptophan
LTPA leisure-time physical activity
LTPP lipothiamide pyrophosphate
LTR laryngotracheal reconstruction; location transactivating region; long terminal repeat
LTRA leukotriene receptor antagonist; long-term repopulating ability
LTS laboratory tests; least trimmed squares [method]; long-term survival; long-term survivor
LTST low-temperature stabilization technology
LTT lactose tolerance test; leucine tolerance test; limited treadmill test; lymphocyte transformation test
LTV lung thermal volume
LTW Leydig-cell tumor in Wistar rat
LTX liver transplantation
LU left upper [limb]; loudness unit; Lupron; lytic unit
Lu lutetium
L&U lower and upper
LUC large unstained cell; luciferase
LUCL lateral ulnar collateral ligament
LUE left upper extremity
LUF lesion underdose factor [radiosurgery]; luteinized unruptured follicle
LUFS luteinized unruptured follicle syndrome
LUKV Lukuni virus
LUL left upper eyelid; left upper limb; left upper lobe; left upper lung
Lumb lumbar
LUMD lowest usual maintenance dose
LUMO lowest unoccupied molecular orbital
LUMPS liver unit management protocol system
LUO left ureteral orifice
LUOQ left upper outer quadrant