Colorectal Cancer 了解大腸直腸癌(英文). 2019/12/27. The lowest part of the digestive system is called the colon. The last six inches of the colon are also called ...HygieneEducationHealthEducationHomeHygieneEducationColorectalCancer了解大腸直腸癌(英文)HygieneEducationHealthEducationColorectalCancer了解大腸直腸癌(英文)文章分享Home分享至FaceBook分享至LineQrcode列印下載A-A+ColorectalCancer了解大腸直腸癌(英文)2019/12/27Thelowestpartofthedigestivesystemiscalledthecolon.Thelastsixinchesofthecolonarealsocalledtherectum.Afterdigestionoffood,residuesaredischargedthroughthecolonandrectum(commonlyknownasthelargeintestine).Cancergrowinginthisareaiscalledcolorectalcancer(orcolon,rectalcancer).Mostcolorectalcancersoriginallyappearassmall,non-cancerous,benigncolorectalpolyps.Colorectalpolypsareprotrusionsthatgrowonthesurfaceofintestinalmucosa.Afteraperiodoftime,somecolonpolypswilldeteriorateintocolorectalcancer.Withthechangeofpeople'sdiet,livinghabitsandenvironment,theincidenceofcolorectalcancerhasbeenontherise,aboutwhichpeopleshouldbeverycareful.SymptomsEarlydetectionofcolorectalcancerisnoteasy,becausewhencolorectalcancerfirstforms,itisonlyasmallmassofcancercells,whichdoesnotcauseintestinalsymptoms.Symptomswouldonlyoccurwhenitgraduallygrowslarger.Whencolorectalcanceroccursintheright-sidelargeintestine(i.e.cecumandascendingcolon),abdominaldistensionoroccultbloodreactioninstoolwillbepositive,i.e.hematochezia.Whenitoccursintheleft-side(i.e.descendingcolon,sigmoidcolon,rectum),abdominalpain,bloodinstoolorchangesinstoolhabits(e.g.diarrheaorconstipation)willoccur.Oncesymptomsappear,itishardtoimaginetheconsequencesofdelayingtreatmentifthepatientthinksitisaminorillness,suchasabadstomachorbleedinghemorrhoids.Ingeneral,youshouldbecarefulwhenyouhavethefollowingsymptoms:AbdominalpainChangeinbowelhabits:suddenorgradualonsetofdiarrheaorconstipationChangesinfecalmorphology:suchasribbonorthinstripshape,bloodystoolandmucousstools,abnormalweightloss,lossofappetite,feelingofabdominalmassWeakandeasilytired,iron-deficiencyanemia.CausesofColorectalCa