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1、PerceptionofcancerIt’sbeen2000yearsforhumanfightingagainsttumor.Inrecent50years,theimprovedburdenoftumorandthedevelopmentandadvancementofmedicalstudyhavechangedtheperceptionofcancerfundamentally.Thetreatmentoftumorhasbeentheimportantpartinscienceresearchanddiseasecontrolling
2、inglobeincludingourcountryaftersteppinginto21century.Withtheimprovementandadvancementoftechnology,peoplehavedefeatedlotsofdifficultiesinmedicineandmademuchcontributiontohumanhealth.However,fourkillerscontainingcardiovasculardisease,diabetes,AIDSandcancerwhichthreatenhumanhea
3、lth,arestilldifficulttocure.Amongthem,we’lldiscusscancerhere.Tumorisresultedfromtheabnormalchangesofcellsingenelevelundervariouscarcinogens.Tumorisdividedintotwocategories,includingbenignandmalignanttumors.Firstlyandthemostimportantly,Whydopeoplegetacancer?Thisquestionconfus
4、esmanypeopleandhasn’treachedacommonversion.Whatasweallknowthatthereproto-oncogenesexistinginhumangenes,whichcanbeactivatedbysomestimulusinairorfood,thusleadingtotheappearanceoftumorcells.Butluckily,theproto-oncogeneareusuallyinhibited.Inthemeanwhile,theresuppressorgenes,fore
5、xamplep53genefamily,existinginhumangenes,whichareusuallyactivetoinhibittheformationoftumorcells.Whentheproto-oncogenesareactivatedanddominant,thenormalcellswillbefaciletotumorcells(benigntumor).Benigntumorcellswilltransformedintomalignanttumorcellswithtime.Malignanttumororca
6、ncercellscanmovetoothertissuesororgans,thusthreateningthelifeofaperson.Thisistheproductionandgrowthprocessofcancer.Aretumorandcancerthesame?Manypeoplefeelconfusedandtheyregardtumorascancer,cancerastumor.Actually,cancerandtumoraredifferent.Cancerisakindofmalignanttumorandbeni
7、gntumorcouldn’tbetreatedascancer.Generally,benigntumorwon’tbeharmfultoone’shealthandlifewhilemalignanttumororcancerwilldamageone’shealthandthreatenlife.Moreseriously,malignanttumorwillcauseonetodeath.Soweshoulddifferentiatebenignandmalignanttumorsothatwecanadoptsometreatment
8、meanstoavoiddegeneration.Doescancerhaveinfection？Itissurethatcancerwon’tinf
