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Medical Abbreviations – L



L left
L' lumbar
LA latex agglutination
  left atrium
  Latin American
  low aptitude
  left arm
  left atrial
  lactic acid
  light adaptation
  lives alone
  local anesthesia
  long acting
LAB laboratory
LABA laser-assisted ballon angioplasty
LAC laceration
  left antecubital
  left atrial catheter
LAD laser anesthesia device
  left anterior descending
  left atrial dimension
  left axis deviation
  lactic acid dehydrogenase
LAE left atrial enlargement
LAF laminar air flow
LAG lymphangiogram
LAH left anterior hemiblock
  left atrial hypertrophy
LAI left atrial isomerism
  leukocyte adherence inhibition
LAK lymphokine-activated killer
LAL left axillary line
  Laugh a little / lot
LAM lactational anovulatory method
LAN Local Area Network
LAO left anterior oblique
  lower airway obstruction
  left anterior oblique
  long acting opioid
LAP laparoscopy
  left abdominal pain
  left atrial pressure
LAQ Lame Ass Quote
LAR laryngeal adductor reflex
  left arm, reclining
  late airway response
  long-acting release
  low anterior resection
LAS lactic acidosis syndrome
  low alcohol sensitivity
  laxative abuse syndrome
  left arm, sitting
LAT lateral
  latex agglutination test
  left anterior thigh
LAUP laser-assisted uvula-palatoplasty
LAV lymphadenopathy associated virus
  left atrial volume
LAW left atrial wall
  Low Alcohol Withdrawal
LAX laxative
LB large bowel
  lateral bend
  left breast
  left buttock
  liver biopsy
  live births
  low back
  lewy bodies
  lung biopsy
lb pound
L & B left and below
LBA laser balloon angioplasty
LBB left bundle branch
  left breast biopsy
LBC liquid-based cytology
  load-bearing capacity
LBD large bile duct
  left border dullness
  low back disorder
  left brain-damaged
  Lewy body dementia
  low back disability
  low bone density
LBH length, breadth, and height
LBI Lewy body-like inclusions
  low back injury
LBM lean body mass
  loose bowel movement
  last bowel movement
LBNA lysis bladder neck adhesions
LBO large bowel obstruction
LBP low back pain
LBQC large base quad cane
LBRF louse-borne relapsing fever
LBS low back syndrome
  lumbar back strain
LBT low back tenderness
LBV left brachial vein
LBW lean body weight
  low birth weight
LC laparoscopic
  laparoscopic cholecystectomy
  large cell
  left circumflex
  lung cancer
  living children
  lethal concentration
  liquid condensed
  liver cirrhosis
  left circumflex
  light chain
  level of consciousness
  low calorie
L & C lids and conjunctivae
LCA left circumflex artery
  left coronary artery
LCB left costal border
LCC left circumflex coronary
  liver cell carcinoma
LCD lattice corneal dystrophy
  low-calcium diet
LCE laparoscopic cholecystectomy
  left carotid endarterectomy
LCF least common factor
late clinical failure
LCGU local cerebral glucose utilization
LCH Langerhans cell histiocytosis
  local city hospital
LCIS lobular cancer in situ
LCLC large-cell lung carcinoma
LCM left costal margin
  lymphocytic choriomeningitis
LCN left caudate nucleus
LCO low cardiac output
LCP late chronic phase
  lectin complement pathway
  lung colonization potential
LCR late cutaneous reaction
  laparoscopic colon resection
  late cortical response
LCS lids, conjunctiva, and sclera
  low constant suction
LCT long-chain triglyceride
LCV large cell variant
LCX left circumflex artery
LD lactic dehydrogenase
  lyme disease
  liver disease
  laser doppler
  last dose
  limited disease
  learning disorder
  left deltoid
  lethal dose
  loading dose
L & D labor and delivery
L/D labor and delivery
LDA left displaced abomasum
  low dose aspirin
  low density areas
LDB Legionnaires disease bacterium
LDCOC low-dose combination oral contraceptive
LDD laser disk decompression
  local drug delivery
  low dose dopamine/dobutamine
  lumbar disk disease
LDEA left deviation of electrical axis
LDF laser-Doppler flowmetry
  laser Doppler flow
LDH lactic dehydrogenase
LDL low-density lipoprotein
LDM lactate dehydrogenase, muscle
  low-density microsomes
LDN laparoscopic donor nephrectomy
  Licensed Dietitian/Nutritionist
LDO Licensed Dispensing Optician
LDP laparoscopic distal pancreatectomy
  language development program
LDR labor, delivery, and recovery
  low dose rate
LDS Language Development Survey
LDT late distal tubule
  low dose test
LDUB long double upright brace
LDV laser-Doppler vibrometer
  lactate dehydrogenase virus
LE Lupus erythematosus
  left ear
  left eye
  live embryo
  local excision
  lower extremities
  leg extension
LEA lower extremity amputation
LEAD lower extremity arterial disease
  Longitudinal, Expert, All Data
LEB lumbar epidural block
  Life Expectancy at Birth
LEC lens epithelial cell
  lower esophageal contractility
LED leucocyte esterase dipstick
  lowest effective dose
  lower extremity disease
LEE lower extremity edema
  Level of Expressed Emotion
  Liver enzyme elevation
LEF lower extremity fracture
  late expression factor
LEH liposome-encapsulated hemoglobin
  linear enamel hypoplasia
LEJ ligation of the esophagogastric junction
LEL low-energy laser
  late embryonic lethality
LEM lateral eye movements
  low-electrolyte meal
LEP lower esophageal pressure
  laser evoked potential
LES local excitatory state
  lower esophageal sphincter
LET leukocyte esterase test
  lidocaine, epinephrine and tetracaine
LEU leucine
LEV levamisole
LF left foot
  Lassa fever
  left foot
  left frontal
  low flow
  living female
  low fat
LFA left femoral artery
  left forearm
LFB lateral forebrain bundle
LFC lateral femoral condyle
  living female child
  low fat and cholesterol
LFD lactose-free diet
  low-fat diet
  low-fiber diet
LFGNR lactose fermenting gram-negative rod
LFI local-field irradiation
  low-flow ischemia
LFL Left Front Leg
LFP late follicular phase
LFS leukemia-free survival
LFT liver function tests
  Lung function tests
  latex flocculation test
LG large
  low grade
  left gluteal
  lacrimal glands
  low glucose
LGA large for gestational age
  left gastric artery
LGBT lesbian, gay, bisexual, and transgender
LGG low-grade gliomas
LGI low glycemic index
  lower gastrointestinal
LGL large granular lymphocyte
  low-grade lymphoma
LGM left gluteus medius
LGN lateral geniculate nucleus
  lupus glomerulonephritis
LGS Lennox-Gastaut syndrome
  lacrimal glands
LGV lymphogranuloma venerum
  left gastric vein
LH luteinizing hormone
  left hand
  left hemisphere
  Light Headed
  loop of Henle
LHA left hepatic artery
  lateral hypothalamic area
LHB long head of the biceps
  left heart bypass
LHC left heart catheterization
LHD left-hand dominant
  lateral head displacement
LHF left heart failure
LHG left hand grip
LHL left hemisphere lesions
  left hepatic lobe
LHON Leber hereditary optic neuropathy
LHP left hemiparesis
  latent hypoparathyroidism
  late hyperpolarizing potential
LHR laparoscopic hernia repair
  LH receptors
  leukocyte histamine release
  legal health record
LHS left heart strain
  left hand side
LHT lateral hypothalamic
  left hypertropia
LI lactose intolerance
  large intestine
  learning impaired
Li lithium
LIA lymphocyte-induced angiogenesis
  latex immunoassay
LIC left iliac crest
  large intestinal cancer
  left internal carotid
LID levodopa-induced dyskinesia
Lido lidocaine
LIF laser-induced fluorescence
  left iliac fossa
  leukocyte inhibitory factor
  left index finger
LIG ligament
LIH left inguinal hernia
  laparoscopic inguinal herniorrhaphy
LIJ left internal jugular
LILA low impulsiveness, low anxiety
LIM limited
LIN liquid nitrogen
LIO laser-indirect ophthalmoscope
  left inferior oblique
LIP lipase
  lithium-induced polydipsia
  lipoic acid
LIQ liquid
LIR left iliac region
  left inferior rectus
LIS late-onset idiopathic scoliosis
  left intercostal space
  low intermittent suction
  laboratory information system
LIT liver injury test
LIV left innominate vein
LIVC left inferior vena cava
LIWS low intermittent wall suction
LJ left jugular
LJM limited joint mobility
LK left kidney
LKSB liver, kidneys, spleen, and bladder
LL left leg
  left lung
  lower lip
  leg length
  laser lithotripsy
  lower lid
  lower limb
  lower lobe
  lymphocytic leukemia
LLAT left lateral
LLE left lower extremity
LLG left lateral gaze
LLI leg-length inequality
LLL left lower lid
  left lower lobe
LLN lower limit of normal
LLOD lower lid, right eye
LLOS lower lid, left eye
LLPS low-load prolonged stress
  liquid-liquid phase separation
LLQ left lower quadrant
LLR left lumbar region
  large local reaction
  left lateral rectus
LLRE lower lid, right eye
LLS lipopolysaccharide-like substance
LLT left lateral thigh
  lipid-lowering therapy
LLX left lower extremity
LM left main
  laryngeal mask
  light microscopy
  living male
  lateral meniscus
  lung metastases
L/M liters per minute
LMA laryngeal mask airway
LMB left main bronchus
LMC Large mononuclear cells
  living male child
  lung mast cells
LMD local medical doctor
LME Leukocyte migration enhancement
  left mediolateral episiotomy
LMF lymphocyte mitogenic factor
  left middle finger
LMI leukocyte migration inhibition
  large multivalent immunogen
L/min liters per minute
LML left middle lobe
  eft medial lateral
LMM lentigo maligna melanoma
  low molecular mass
LMN lower motor neuron
LMP last menstrual period
  low malignant potential
  lumbar puncture
LMR left medial rectus
LMS lateral medullary syndrome
  left main stem
LMT lateral meniscus tear
  left main trunk
  leukocyte migration test
LMW low molecular weight
LN latent nystagmus
  liquid nitrogen
  left nostril
  lymph node
LNA latent nuclear antigen
  linolenic acid
LNB lymph node biopsy
LNC Legal Nurse Consultant
  lymph node cell
LND lymph node dissection
LNE lymph node enlargement
  lymph node excision
LNF laparoscopic Nissen fundoplication
LNG levonorgestrel
LNM lymph node metastases
LNS lymph node sampling
  Limited Nursing Services
LNT late neurological toxicity
LNU laparoscopic nephroureterectomy
LNV last normal vertebra
LO lateral oblique
  late onset
  lumbar orthosis
LOA level of activity
  leave of absence
  late-onset agammaglobulinemia
LOB loss of balance
LOC loss of consciousness
  laxative of choice
  level of care
  loss of control
  level of comfort
  level of consciousness
LOD limit of detection
LOE lack of evidence
  left otitis externa
LOF Level of functioning
  leaking of fluids
LOH loss of heterozygosity
  loop of henle
  late-onset hypogonadism
LOIH left oblique inguinal hernia
LOI level of injury
LOL left occipitolateral
  lonely old Lady
LOM left otitis media
  loss of memory
  limitation of motion
  loss of motion
LOO length of operation
LOP laparoscopic orchiopexy
  left occiput posterior
  level of pain
  level of processing
LOQ limit of quantitation
  lower outer quadrant
LOR loss of resistance / response
LOS length of stay
  loss of sight
  low-output syndrome
LOT lateral olfactory tract
  left occiput transverse
LOV loss of vision
LOX lipid oxidation
LOZ lozenge
LP lumbar puncture
  luteal phase
  lamina propria
  low potency
  latency period
  Licensed Psychologist
  light perception
  low protein
L/P lactate-pyruvate ratio
  lidocaine and prilocaine
LPA left pulmonary artery
latex particle agglutination
LPC late positive complex
  Licensed Professional Counselor
  laser photocoagulation
LPD luteal phase defect
  low-protein diet
LPEP left pre-ejection period
LPF lymphocytosis-promoting factor
  liver plasma flow
LPH left posterior hemiblock
  lipotropic pituitary hormone
LPI left posterior-inferior
  laser peripheral iridectomy
LPL laparoscopic pelvic lymphadenectomy
  left posterolateral
  lipoprotein lipase
  low power laser
LPM liver plasma membrane
  latent primary malignancy
LPN Licensed Practical Nurse
LPO left posterior oblique
  lipid peroxidation
LPPC leukocyte-poor packed cells
LPR laryngopharyngeal reflux
  lactate-pyruvate ratio
  late phase reaction
LPT Licensed Physical Therapist
  lymphocyte proliferation test
LPV left portal vein
LPZ lateral peripheral zone
LQTS long QT syndrome
LR lactated Ringers
  labor room
  linear response
  laser resection
  lateral rectus
  light reflex
L & R left and right
LRA left radial artery
  left renal artery
LRC lower rib cage
  leukocyte receptor complex
  Licensed Rehabilitation Counselor
  Lipid Research Clinic
LRD limb reduction defects
  living-related donor
  lower respiratory tract disease
LRE leukemic reticuloendotheliosis
  localization-related epilepsy
LRF LH-releasing factor
  Lymphoma Research Foundation
  left rectus femoris
LRHT living-related hepatic transplantation
LRI lower respiratory infection
  lymphocyte reactivity index
LRM left radical mastectomy
LRN lateral reticular nucleus
  laparoscopic radical nephrectomy
LRO long-range objective
LRP lichen ruber planus
  leukocyte-rich plasma
  laparoscopic radical prostatectomy
LRQ lower right quadrant
LRR light reflection rheography
  leucine-rich repeat
LRS lactated Ringer solution
  likelihood ratios
LRT living renal transplant
  laryngeal reaction time
  lower respiratory tract
LRV left renal vein
  log reduction value
LRZ lorazepam
LS left side
  liver scan
  loose stool
  light sleep
  laparoscopic surgery
  lung sounds
L/S lecithin-sphingomyelin ratio
L & S ligation and stripping
  liver and spleen
LSA left subclavian artery
  left sacrum anterior
LSAS Liebowitz Social Anxiety Scale
LSB left scapular border
  left sternal border
  lumbar spinal block
LSC least significant change
  lichen simplex chronicus
  last sexual contact
  late systolic click
  left subclavian
  leukemic stem cell
LSD lysergic acid diethylamide
  lysosomal storage disease
  least significant difference
  low-salt diet
LSE local side effects
  left sternal edge
  least squares error
  low self-esteem
LSF low-saturated fat
  least-squares fit
  lung surfactant factor
LSH laparoscopic supracervical hysterectomy
   lutein-stimulating hormone
LSI life satisfaction index
   lumbar spine index
  limb salvage index
LSK liver, spleen, and kidneys
LSL left sacrolateral
  left short leg
LSM laser scanning microscope
  late systolic murmur
  least square mean
LSO left superior oblique
  lumbosacral orthosis
LSP left sacrum posterior
  liver-specific protein
  life span
  lumbar spine
L-spine lumbar spine
LSQ Life Satisfaction Questionnaire
  Life Situation Questionnaire
LSR laser skin resurfacing
  laparoscopic sigmoid resection
  light sarcoplasmic reticulum
  limb salvage rate
  left superior rectus
L/S ratio lecithin/sphingomyelin ratio
LSS limb-sparing surgery
  Life Span Study
  lumbar spinal stenosis
  liver-spleen scan
  life saving skills
LST Life skills training
  life-sustaining treatment
  lateral spreading tumor
  laterally spreading tumor
  left sacrum transverse
  Laser scanning tomography
LSU life support unit
LSV lesser saphenous vein
  lateral sacral vein
  lleft subclavian vein
LSW Licensed Social Worker
  left-side weakness
LT laboratory technician
  less than
  light touch
  left thigh
  left triceps
  laser therapy
  lag time
LTA laser thermal ablation
  life-threatening asthma
LTB labeled TSH binding
  laparoscopic tubal banding
LTC long-term care
  life-threatening conditions
LTD largest tumor dimension
  leg transfer device
  Liver Transplantation Database
  long-term depression
  long-term disability
LTE less than effective
  left temporal lobe epilepsy
LTF lactotransferrin
  late treatment failure
  lost to follow-up
LTG lamotrigine
  long-term goal
  low tension glaucoma
LTH left total hip
  luteotropic hormone
  local tumor hyperthermia
  Language Therapy
LTK laser thermal keratoplasty
LTL laparoscopic tubal ligation
  left temporal lobe
  left temporal lobectomy
LTM long-term memory
  long-term monitoring
  lean tissue mass
LTNPS long-term nonprogressors
LTOT long-term oxygen therapy
LTP long term potentiation
  laser trabeculoplasty
LTR long terminal repeats
  Lichenoid tissue reaction
  local twitch response
  laryngotracheal reconstruction
  lower trunk rotation
LTS laparoscopic tubal sterilization
  long-term survival
  low-threshold spike
  laryngotracheal stenosis
  least trimmed squares
LTT lactose tolerance test
LTUI low transverse uterine incision
LTV long-term variability
  long-term ventilation
LTX liver transplant
LU left upper
  laparoscopic ultrasound
  left ureteral
L & U lower and upper
LUA left upper arm
LUD left uterine displacement
LUE left upper extremity
LUL left upper lid
  left upper lobe
  left upper limb
LUNA Laparoscopic uterine nerve ablation
  laparoscopic uterosacral nerve ablation
LUQ left upper quadrant
LUS laparoscopic ultrasonography
  lower uterine segment
LUT lower urinary tract
LV left ventricle
  lateral ventricle
  lassa virus
  lung volume
  lumbar vertebrae
  live virus
LVA left ventricular aneurysm
  left vertebral artery
  left visual acuity
LVC laser vision correction
  Left ventricular cavity
  left ventricular contraction
  loss of verbal contact
LVAD left ventricular assist device
LVAS left ventricular assist system
LVBP left ventricle bypass pump
LVD left ventricular dysfunction
  left ventricular dimension
LVE left ventricular enlargement
  lateral vestibular nucleus
  left ventricular ejection
LVF left ventricular failure
  left visual field
LVG left ventriculogram
LVH left ventricular hypertrophy
LVID left ventricular internal diameter
LVL large volume leukapheresis
  left vastus lateralis
LVM left ventricular mass
LVN Licensed Vocational Nurse
  lateral vestibular nucleus
  Licensed Visiting Nurse
LVO left ventricular output/outflow
LVP left ventricular pressure
  large volume paracentesis
  left ventricular pacing
  lysine vasopressin
  large volume parenteral
LVR left ventricular remodeling
  limb vascular resistance
  lung volume reduction
LVS left ventricular strain
  live vaccine strain
LVT Licensed Veterinary Technician
  left ventricular tension
   left ventricular thrombi
LVV left ventricular volume
  live varicella vaccine
LVW left ventricular wall
LW lacerating wound
  living will
LWAQ Living with Asthma Questionnaire
LWCT Lee-White clotting time
LWBS left without being seen
LWC leave without consent
  lung water concentration
LWD Leri-Weill dyschondrosteosis
LWP lateral wall pressure
LX Lumpectomy
  lower extremity
LXC laxative of choice
LYCD live-yeast cell derivative
LYEL lost-years of expected life
LYG lymphomatoid granulomatosis
  life-year gained
LYM lymphocytes
lymphs lymphocytes
LYS life years saved
lytes electrolytes
LZ lorazepam
LZP lorazepam
Medical Abbreviations – L