URMC / Encyclopedia / Collection Lactate Dehydrogenase (Blood) Lactate Dehydrogenase (CSF) Lactate Dehydrogenase Isoenzymes Lactose Tolerance (Blood) Lactose Tolerance Hydrogen (Breath) Laminectomy Laparoscopic Adjustable Gastric Banding Laparoscopy Laser Photocoagulation for Age-Related Macular Degeneration (AMD) Lateral Ankle Ligament Reconstruction LDL Cholesterol Lead (Blood) Lead Extraction Lecithin-Sphingomyelin Ratio (Amniotic Fluid) Lipase Lipid Panel Lipid Panel with Non-HDL Cholesterol Lipid Panel with Total Cholesterol: HDL Ratio Lipoprotein(a) Cholesterol Lipoprotein-Associated Phospholipase A2 Lithium Lithotripsy Liver Biopsy Liver Kidney Microsomal Antibody Liver Panel Liver Scan Liver Transplant Lobectomy Loop Electrosurgical Excision Procedure (LEEP) Loop Recorder Implantation Lumbar Disk Replacement Lumbar Puncture Lung Biopsy Lung Scan Lung Transplant Lupus Anticoagulant Luteinizing Hormone (Blood) Minimally Invasive Lumbar Discectomy