Labial fusionLabiaplastyLabyrinthitisLacerationsLactate dehydrogenase (LDH) testLactose intoleranceLaparoscopic cholecystectomyLaparoscopyLaryngeal (larynx) cancerLaryngitisLaryngotracheitisLaser hair removalLateral epicondylitisLaxativesLazy eyeLeaky gut syndromeLeg crampsLeg ulcer, venousLeg, brokenLegionnaires' diseaseLeptospirosisLeukaemia, acute lymphoblasticLeukaemia, acute myeloidLeukaemia, chronic lymphocyticLeukaemia, chronic myeloidLeukaemia, hairy cellLeukonychia (white spots on nails)LeukoplakiaLewy body dementiaLice (head)Lice (pubic)Lichen planusLichen sclerosusLightheadednessLimping in childrenLipid-lowering medicinesLipoedemaLipomaLiposuctionLips, blueLips, sore or dryListeriosisLiver cancerLiver diseaseLiver transplantLocal anaestheticLocked neckLockjawLong QT syndromeLong-sightednessLoss of libidoLoss of visionLou Gehrig's diseaseLow blood pressureLow dose aspirinLow sperm countLumbar decompression surgeryLumbar punctureLump or swellingLumpy jaw (actinomycosis)Lung cancerLung transplantLupusLyme diseaseLymphoedemaLymphoma, HodgkinLymphoma, non-Hodgkin