Dictionary of Medical Acronyms & Abbreviations

[ L ]

• LLBCD  left lower border of cardiac dullness
• LLC  laparoscopic laser cholecystectomy; Lewis lung carcinoma; link layer controller [telemedicine]; liquid-liquid chromatography; long-leg cast; lymphocytic leukemia
• LLCC  long-leg cylinder cast
• LLCD  link layer controller detector [telemedicine]
• LLC-MK1  rhesus monkey kidney cells
• LLC-MK2  rhesus monkey kidney cells
• LLC-MK3  Cercopithecus monkey kidney cells
• LLC-RK1  rabbit kidney cells
• LLD  left lateral decubitus [muscle]; leg length discrepancy; limb length discrepancy; lipid-lowering drug; long-lasting depolarization
• LLE  left lower extremity
• LLETZ  large loop excision of the transformation zone
• LLF  Laki-Lorand factor; late-life forgetfulness; left lateral femoral; left lateral flexion
• LLI  leg length inequality; low-level interface
• LLL  late luminal loss; left lower [eye]lid; left liver lobe; left lower leg; left lower lobe
• LLLE  lower lid left eye
• LLLT  low-reactive level laser therapy
• LLM  localized leukocyte mobilization
• LLMSE  linear least mean square error
• LLN  lower limit of normal
• LLNA  local lymph node assay
• LLO  Legionella-like organism; listeriolysin O; lower limb orthosis
• LLP  late luteal phase; long-lasting potentiation
• LLPV  left lower pulmonary vein
• LLQ  left lower quadrant; low-level question
• LLR  large local reaction; left lateral rectus [muscle]; left lumbar region; ligation linked [polymerase chain] reaction; long intergenic region; long latency reflex
• LLRE  lower lid right eye
• LLS  lazy leukocyte syndrome; Level of Living Survey; linear least squares; long-leg splint; low-level segmentation [module]
• LLSB  left lower scapular border; left lower sternal border
• LLSF  linear least squares fit
• LLSV  Llano Seco virus
• LLT  left lateral thigh; lysolecithin
• LLV  lymphatic leukemia virus
• LLV-F  lymphatic leukemia virus, Friend associated
• LLVP  left lateral ventricular preexcitation
• LLWC  long-leg walking cast
• LLX  left lower extremity
• LLZ  left lower zone
• LLZ-TB  lower lung zone tuberculosis
• LM  labiomental; lactic acid mineral [medium]; lactose malabsorption; laminin; laryngeal mask; laryngeal melanosis; laryngeal muscle; lateral malleolus; left main [coronary artery]; left marginal [coronary artery]; left median; legal medicine; lemniscus medialis; leptomeningeal; Levenberg-Marquardt [algorithm]; Licentiate in Medicine; Licentiate in Midwifery; light microscope, light microscopy; light minimum; lincomycin; lingual margin; linguomesial; lipid mobilization; liquid membrane; Listeria monocytogenes; living male; localized movement; longitudinal muscle; lower motor [neuron]; lung metastases; lymphatic metastases
• L/M  Latin male
• Lm  Listeria monocytogenes
• Lm  lower midline; lumen
• L/m  liters per minute
• LMA  laryngeal mask airway; left main [coronary] artery; left mentoanterior [fetal position]; limbic midbrain area; liver cell membrane autoantibody
• LMB  Laurence-Moon-Biedl [syndrome]; left main bronchus; leiomyoblastoma; leukomethylene blue
• LMBB  Laurence-Moon-Bardet-Biedl [syndrome]
• LMBS  Laurence-Moon-Biedl syndrome
• LMC  large motile cell; lateral motor column; left main coronary [artery]; left middle cerebral [artery]; living male child; lymphocyte-mediated cytotoxicity; lymphomyeloid complex
• LMCA  left main coronary artery; left middle cerebral artery
• LMCAD  left main coronary artery disease
• LMCAO  left marginal coronary artery occlusion
• LMCC  Licentiate of the Medical Council of Canada
• LMCL  left midclavicular line
• LMD  lipid-moiety modified derivative; local medical doctor; low-molecular-weight dextran; lumbar microdiscotomy
• LMDS  locally multiply damaged sites
• LMDX  low-molecular-weight dextran
• LME  left mediolateral episiotomy; leukocyte migration enhancement; longitudinal mixed effects [in linear regression analysis]
• LMed&Ch  Licentiate in Medicine and Surgery
• LMF  left middle finger; lymphocyte mitogenic factor
• Lm/ft²  lumens per square foot
• LMG  lethal midline granuloma
• LMH  lipid-mobilizing hormone
• Lmh  lumen hour
• LMI  leukocyte migration inhibition
• LMIF  leukocyte migration inhibition factor
• L/min  liters per minute
• LMK  low molecular weight kininogen
• LML  large and medium lymphocytes; left mediolateral; left middle lobe
• LMM  Lactobacillus maintenance medium; laser microbeam microdissection; lentigo maligna melanoma; light meromyosin
• Lm/m²  lumens per square meter
• LMMG  low molecular mass G [protein]
• LMMH  low molecular mass heparin
• LMN  lower motor neuron
• LMNL  lower motor neuron lesion
• LMO  living modified organism; localized molecular orbital
• LMP  large multifunctional protease; last menstrual period; latent membrane potential; left mentoposterior [fetal position]; lumbar puncture
• LMPS  lethal multiple pterygium syndrome
• LMR  left medial rectus [muscle]; localized magnetic resonance; longitudinal medical record; lymphocytic meningopolyradiculitis
• LMRCP  Licentiate in Midwifery of the Royal College of Physicians
• LMRP  local medical review policy
• LMS  laser marker system; lateral medullary syndrome; least mean square; left main stem [coronary artery]; leiomyosarcoma; Licentiate in Medicine and Surgery
• Lms  lumen-second
• LMS HPF  least means square high pass filter
• LMSSA  Licentiate in Medicine and Surgery of the Society of Apothecaries
• LMT  left main trunk; left mentotransverse [fetal position]; leukocyte migration technique
• LMV  larva migrans visceralis
• LMW  low molecular weight
• Lm/W  lumens per watt
• LMWD  low-molecular-weight dextran
• LMWH  low-molecular-weight heparin
• LMWP  low-molecular-weight proteinuria
• LMWT  low molecular weight
• LMZ  left midzone
• LN  labionasal; laminin; Lesch-Nyhan [syndrome]; lipoid nephrosis; Lisch nodule; low necrosis; lung nodule; lupus nephritis; lymph node; Lyon normotensive [rat]
• Ln  lymph node
• LN₂  liquid nitrogen
• L/N  letter/numerical [system]
• Ln  natural logarithm
• LNAA  large neutral amino acid
• LNBx  lymph node biopsy
• LNC  lymph node cell
• LND  lymph node dissection
• LNDS  lymph node [cancer] negative dataset
• LNE  lymph node enlargement
• LNF  laparoscopic Nissen fundoplication
• LNH  large number hypothesis
• LNKS  low natural killer syndrome
• LNL  lymph node lymphocyte
• LNLS  linear-nonlinear least squares
• LNM  lymph node metastasis
• LNMC  lymph node mononuclear cell
• LNMP  last normal menstrual period
• LNNB  Luria-Nebraska Neuropsychological Battery
• LNP  large neuronal polypeptide
• LNPF  lymph node permeability factor
• LNS  lateral nuclear stratum; Lesch-Nyhan syndrome
• LNV  last normal vertebra
• LO  lateral oblique; linguo-occlusal; lipoxygenase; lumbar orthosis; lysyl oxidase
• 5-LO  5-lipooxygenase
• LOA  leave of absence; Leber optic atrophy; left occipitoanterior [fetal position]
• LOAEL  lowest observed adverse effect level
• LOC  laxative of choice; level of consciousness; liquid organic compound; locus of control; loss of consciousness
• LOCA  low osmolarity contrast agent
• Lo cal  low calorie
• Lo calc  low calcium
• LOCAT  Lopid Coronary Angiography Trial
• LOCF  last observation carried forward
• Lo CHO  low carbohydrate
• Lo chol  low cholesterol
• LOCM  low molecular contrast medium
• LOCS  laryngoonychocutaneous syndrome
• LOD  line of duty; log odds ratio [score]
• LOF  lofexidine
• LOFD  low outlet forceps delivery
• LOG  lipoxygenase
• LOG, LoG  laplacian of gaussian [in imaging]
• Log  logarithm
• LOGIC  laryngeal and ocular granulations in children of Indian subcontinent [syndrome]
• LOH  loop of Henle; loss of heterozygosity
• LOHF  late-onset hepatic failure
• LOI  level of incompetence; level of injury; limit of impurities; loss of imprinting
• LOIH  left oblique inguinal hernia
• LOINC  Logical Observation Identifier of Names and Codes [vocabulary]
• Lo k  low potassium
• LOKD  late-onset Krabbe disease
• LOKV  Lokern virus
• LOL  left occipitolateral [fetal position]
• LOM  left otitis media; ligament of Marshall; limitation of motion; loss of motion
• LOMC  laser optical memory card
• LOMIR-MCT-IL  Lomir [isradipine] Multicenter Study in Israel
• LOMSA  left otitis media suppurativa acuta
• LOMSC, LOMSCh  left otitis media suppurativa chronica
• Lo Na  low sodium
• Long  longitudinal
• LONIR  Laboratory of Neuro-Imaging Resources
• LOP  leave on pass; left occipitoposterior [fetal position]
• LOPAIR  long path infrared [alarm]
• LOPP  chlorambucil, vincristine, procarbazine, prednisolone
• LOPS  length of patient's stay
• LOQ  lower outer quadrant
• LOR  long open reading frame; lorazepam; loricrin; loss of righting reflex
• Lord  lordosis, lordotic
• LORETA  low-resolution brain electromagnetic tomography
• LORF  long open reading frame
• LOS  length of stay; Licentiate in Obstetrical Science; lipo-oligosaccharide; low cardiac output syndrome; lower [o]esophageal sphincter
• LOS(P)  lower [o]esophageal sphincter (pressure)
• LOT  lateral olfactory tract; left occipitotransverse [fetal position]; Long-Term Outcome after Thrombolysis [study]
• Lot  lotion
• LOV  large opaque vesicle; loviride
• LOWBI  low-birth-weight infant
• LOX  liquid oxygen; lysyl oxidase
• LOXL  lysyl oxidase-like
• LP  labile peptide; labile protein; laboratory procedure; lactic peroxidase; lamina propria; laryngopharyngeal; late potential; latent period, latency period; lateralis posterior [muscle]; lateral plantar; lateral posterior; lateral pylorus; latex particle; Legionella pneumophila; leukocyte poor; leukocytic pyrogen; levator palati; levator palpebrae; lichen planus; ligamentum patellae; light padding; light perception; lingua plicata; linear predictive [spectral analysis]; linear programming; linguopulpal; lipoprotein; liver plasma [concentration]; longitudinal propagation; loss of privileges; low potency; low power; low pressure; low protein; lumbar puncture; lumboperitoneal; lung parenchyma; lymphocyte predominant; lymphoid plasma; lymphomatoid papulosis
• L/P  lactate/pyruvate [ratio]; liver plasma [concentration]; lymph/plasma [ratio]
• Lp  lipoprotein; sound pressure level
• L_p  pathlength
• LPA  latex particle agglutination; left pulmonary artery; lipoprotein A; lysophosphatidic acid
• Lp(a)  lipoprotein A
• LPAM  L-phenylalanine mustard
• LPB, Lp(b)  lipoprotein B
• LPBP  low-profile bioprosthesis
• LPC  laser photocoagulation; late positive component; leukocyte-poor cell; linear predictive coding; lipocortin; longitudinal primary care [program]; lysophosphatidylcholine
• LPCh  latero-posterior choroidal
• LPCM  low-placed conus medullaris
• LP/cm  line pairs per centimeter
• LPCT  late proximal cortical tubule
• LPD  Lovelace Patient Database; low-protein diet; luteal phase defect; lymphoproliferative disease
• LPDF  lipoprotein-deficient fraction
• LPDS  lymph node [cancer] positive dataset
• LPE  lipoprotein electrophoresis; liquid phase epitaxy; lysophosphatidylethanolamine
• LPF  leukocytosis-promoting factor; leukopenia factor; lipopolysaccharide factor; localized plaque formation; low pass filter; low-power field; lymphocytosis-promoting factor
• Lpf  low-power field
• LPFB  left posterior fascicular block
• LPFN  low-pass filtered noise
• LPFS  low-pass filtered signal
• LPG  left paracolic gutter; lipophosphoglycan
• LPH  lactase-phlorizin hydrolase; left posterior hemiblock; lipotropic pituitary hormone
• LPHA  local public health agency
• LPHAS  limb/pelvis-hypoplasia/aplasia syndrome
• LPHD  lymphocyte-predominant Hodgkin disease