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lungcancerWhatisLungCancer?BeginswhencellsinthelunggrowoutofcontrolandformatumorEtiologyandpathogenesisCigarettesmokingOtherfactorsincludeairpollutionsNowadaysItisreportedthattuberculosisisassociatedwiththeincidenceoflungcancer

ClassificationsAccordingtoanatomy:(1)Centrallung(2)peripherallungcancerAccordingtohistologicclassification:Smallcelllungcancer(SCLC)andNon-smallcelllungcancer(NSCLC).NSCLCincludesSquamouscellcarcinoma,largecellcarcinoma,adenocarcinoma,adenosquamouscarcinoma.Smallcelllungcancer(SCLC)

Oat-cellcarcinoma

SCLCgrowsveryrapidlyandisveryaggressive.Soonaftertheoriginalcellbecomescancerous,itquicklymultipliestoformatumor.ThesecellsswiftlyspreadtodistantsitesinthebodySCLCbelongsinagroupoftumorsderivedfromneuroendocrinecellsthatareresponsiblefortheproductionandsecretionofspecificpeptideproduct.theymayrelatedtoparaneoplasticsyndrome.Cellsareovalorvaguelyspindle-shaped,havescantcytoplasm

Squamouscellcarcinomathemostfrequentformofthetumor(30-50percentofallcasesbronchialepitheliumandgrowthinsituItisrelatedtocigarettesmokingCavitationcanoccureinthedistaltotheobstructingmassCentrallocationIntercellularbridgesandcellularpleomorphismsquamouscellcarcinomausuallyoccursnearthebronchi,thetumorcancausecough(sometimesacoughthatistingedwithblood),shortnessofbreath,wheezing,andpneumoniaintheareabetweenthetumorandtheedgeofthelungitcausessymptomsearlyinthedisease

adenocarcinomaareasofscarringisassociatedwiththeoccurrenceofadenocarcinoma.Peripheraladenocarcinomasareusuallywell-circumscribed,grey-whitemassesthatrarelycavitate.Itarisesfromthesubmucosalglands,locatedinperipheralairwaysandalveoliFemalelargecellcarcinomalargenuclei,prominentnucleoli,abundantcytoplsmausuallylocatedperipherallycanbequitelargeandnotinfrequentlycavitatetheSymptomsofLungCancerFatigue(tiredness)CoughShortnessofbreathChestpainLossofappetiteCoughingupphlegmHemoptysis(coughingupblood)Ifcancerhasspread,symptomsincludebonepain,difficultybreathing,abdominalpain,headache,weakness,andconfusionDuetoprimarylesions:cough,dyspnea,hemoptysis,sputum,wheezing,weightloss,fever,pneumoniaDuetolocalextension:chestpain,hoarseness,superiorvenacavasyndrome,horner’ssyndrome,dysphagia,pericardialeffusion,pleuraleffusion,diaphragmparalysisOnly5-15percentofpatientsareasymptomaticwhendiscoveredtohavebronchogeniccarcinoma.Regionnalspreadtohilarandmediastinalnodesmaycausedysphagiaduetoesophagealcompressionhorsenessduetorecurrentlaryngealnervecompressionhorner’ssyndromeduetosympatheticnerveinvolvementelevationofthehemidiaphragmfromphrenicnervecompression.Superiorsulcus,orpancoast’stumormayinvolvethebrachialplexus,resultinginac7-t2neuropathywithpain,numbness,andweaknessofthearm.CardiacinvolvementisseeninAbout20-25percentofpatients

Extrapulmonarymanifestations.Includingmetastasistootherorgans,suchasbrain,centralnervoussystem,skeletonsystem,liver,adrenalglandsandlymphnodesects.Paraneoplasticsyndromesareremoteeffectsoftumor.Theyleadtometabolicandneuromusculardisturbancesunrelatedtotheprimarytumor,metastases,ortreatment.Theymaybethefirstsignofthetumor.Theydonotindicatethatatumorhasspread.PhysicalexaminationsUsuallyinearlystage,mostofthepatientswithlungcancerhavenopositivephysicalfindings.Generalfindingsincludeabnormalpercussion,breathsoundschanges,moistrales(whenpneumoniahappens)Digitalclubbing,superiorvenacavasyndrome,horner’ssyndrome(unilaterallyconstrictedpupil,enophthalmos,narrowedpalpebralfissureandlossofsweatingonthesamesideoftheface.PhysicalexaminationsEndobronchialobstructionmayresultinalocalizedwheezeLobarcollapsemayresultinanareaofdecreasedbreathsoundsanddullnesstopercussion.HowisLungCancerEvaluated?Becausealmostallpatientswillhaveatumorinthelung,achestx-rayorCTscanofthechestisperformedThediagnosismustbeconfirmedwithabiopsyThelocation(s)ofallsitesofcancerisdeterminedbyadditionalCTscans,PET(positronemissiontomography)scans,andMRI(magneticresonanceimaging)Itisimportanttofindoutifcancerstartedinthelungorsomewhereelseinthebody.CancerarisinginotherpartsofthebodycanspreadtothelungaswellChestX-ray

ItisthemostimportantmethodtofindlungcancerThemostfrequentfindingisamassinthelungfieldOnchestX-ray,secondarymanifestationsincludelobarcollapse,pleuraleffusion,pneumonitis,elevationofthehemidiaphragm,hilarandmediastinaladenopathy,anderosionofribsorvertebraeduetometastases.ObstructiveatelectasisLungcanceronCT

CTisthemostusefulinevaluatingpatientswithpulmonaryandmediastinalmasses.Itisalsousefulfordetectingmultiplemetastases.CTcanshowamasstobelocatedinwhichlobeoflungfieldandthesizeofthemass.Italsoshowsthenoduleinthemediastinum.Sometimes,whenamasslocatebehindtheheart,chestX-raycan`tdetectit.CTcandetectsomesecretsitesoflungcancer.

BronchoscopyRigidandflexiblescopeBiopsyandselectivewashingsLargersamplesthanflexiblescopeExactlocationLobectomyPneumonectomyUnresectableSleeveTransthoraciclungbiopsyItmaybeutilizedwhentumorlocatedinperipheralairway.TransthoracicneedlewithguidancebyCTcanbeusedtodetectlesionslocatednearthechestwallVideoAssistedThoracicSurgeryDiagnosisofpleuraldiseaseWedgeresectionMediasteinoscopy&MediasteinotomyDiagnosesunresectablediseaseEliminateN2diseasefromsurgicalresectionThoracotomyIfthemethodsmentionedabovearenotusefulfordetectingthecelltypeoflungcancer,thoracotomymaybeusedStagingoflungcancerStagingisawayofdescribingacancer,suchasthesizeofthetumorandwhereithasspreadStagingisthemostimportanttooldoctorshavetodetermineapatient’sprognosis

ThetypeoftreatmentapersonreceivesdependsonthestageofthecancerStagingisdifferentfornon-smallcelllungcancerandsmallcelllungcancer

StageINon-SmallCellLungCancerCancerisfoundonlyinthelungSurgicalremovalrecommendedRadiationtherapyand/orchemotherapymayalsobeusedStageIINon-SmallCellLungCancerThecancerhasspreadtolymphnodesinthelungTreatmentissurgerytoremovethetumorandnearbylymphnodesChemotherapyrecommended;radiationtherapysometimesgivenafterchemotherapy

StageIIINon-SmallCellLungCancerThecancerhasspreadtothelymphnodeslocatedinthecenterofthechest,outsidethelungStageIIIAcancerhasspreadtolymphnodesinthechest,onthesamesidewherethecanceroriginatedStageIIIBcancerhasspreadtolymphnodesontheoppositesideofthechest,underthecollarbone,orthepleura(liningofthechestcavity)SurgeryorradiationtherapywithchemotherapyrecommendedforstageIIIAChemotherapyandsometimesradiationtherapyrecommendedforstageIIIB

StageIVNon-SmallCellLungCancerThecancerhasspreadtodifferentlobesofthelungortootherorgans,suchasthebrain,bones,andliverStageIVnon-smallcelllungcanceristreatedwithchemotherapySmallcelllungcancerhasoftenmetastasizedatthetimeofdiagnosis.TNMstagingisnotsuitedtosmallcelllungcancer.TreatmentIncluding:A:SurgeryB:ChemotherapyC:RadiationtherapyD:Someothertherapyimmunologictherapy,ChinesetraditionaltherapySurgeryNon-smallcelllungcancer:patientswithstageIandIIareconsideredcandidatesforsurgicalresection,withstageIIIcancermaybecandidatesforsurgerywithpostoperativeradiationofthemediastinum.SurgeryWemustmeasurepulmonaryfunctionb