[{"data":1,"prerenderedAt":93},["ShallowReactive",2],{"media-slots-en":3,"wiki-item-en-calon-cancer":61},{"about.hero":4,"about.video":6,"about.video-cover":8,"charity.hero":10,"contact.hero":12,"evidence.hero":14,"footer.qr-blood":16,"footer.qr-mini":18,"footer.qr-official":20,"footer.qr-solid":22,"guide.hero":24,"home.hero":26,"home.news-featured":28,"home.story-featured":30,"news.hero":32,"news.lead":34,"news.thumb":36,"stories.cover":41,"stories.hero":48,"stories.lead":50,"wiki.cat":52,"wiki.detail-hero":57,"wiki.hero":59},[5],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E5%85%B3%E4%BA%8E%E5%8D%9A%E5%8C%BB%E5%90%8C%E8%A1%8C_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[7],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002F%E9%A3%9E%E4%B9%A620260729-233252_compressed.mp4",[9],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002F%E9%A3%9E%E4%B9%A620260729-233252_frame1.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[11],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E5%85%AC%E7%9B%8A%E8%B5%84%E6%BA%90%E9%93%BE%E6%8E%A5_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[13],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fbytx-pc-uploads\u002F2026\u002F08\u002Fbde8f2354d29ffca7dcfe395ef4711b2.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[15],"https:\u002F\u002Fwww.yyhmedical.com\u002Fimages\u002Fevidence\u002Fhero.jpg",[17],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002Fqr-blood.png?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[19],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002Fqr-mini.png?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[21],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002Fqr-official.png?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[23],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fabout\u002Fqr-solid.png?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[25],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E7%96%BE%E7%97%85%E7%9F%A5%E8%AF%86%E5%BA%93_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[27],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E9%A6%96%E9%A1%B5_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[29],"\u002Fimages\u002Fhome\u002Fnews-featured.jpg",[31],"\u002Fimages\u002Fhome\u002Fstory-featured.jpg",[33],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E6%82%A3%E5%8F%8B%E5%85%B3%E6%B3%A8_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[35],"\u002Fimages\u002Fnews\u002Flead.jpg",[37,38,39,40],"\u002Fimages\u002Fnews\u002Fn1.jpg","\u002Fimages\u002Fnews\u002Fn2.jpg","\u002Fimages\u002Fnews\u002Fn3.jpg","\u002Fimages\u002Fnews\u002Fn4.jpg",[42,43,44,45,46,47],"\u002Fimages\u002Fstories\u002Fs1.jpg","\u002Fimages\u002Fstories\u002Fs2.jpg","\u002Fimages\u002Fstories\u002Fs3.jpg","\u002Fimages\u002Fstories\u002Fs4.jpg","\u002Fimages\u002Fstories\u002Fs5.jpg","\u002Fimages\u002Fstories\u002Fs6.jpg",[49],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E6%82%A3%E8%80%85%E6%95%85%E4%BA%8B_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",[51],"\u002Fimages\u002Fstories\u002Flead.jpg",[53,54,55,56],"\u002Fimages\u002Fwiki\u002Fcat-1.jpg","\u002Fimages\u002Fwiki\u002Fcat-2.jpg","\u002Fimages\u002Fwiki\u002Fcat-3.jpg","\u002Fimages\u002Fwiki\u002Fcat-4.jpg",[58],"\u002Fimages\u002Fwiki\u002Fdetail-hero.jpg",[60],"https:\u002F\u002Fgaobo-byh-h5.oss-cn-beijing.aliyuncs.com\u002Fstatic\u002Fpc_banner\u002F%E6%8A%97%E7%99%8C%E7%99%BE%E7%A7%91_en.jpg?x-oss-process=image\u002Fresize,limit_1,w_1600\u002Fquality,q_80\u002Fformat,webp",{"slug":62,"category":63,"categoryName":64,"title":65,"summary":66,"toc":67,"ymyl":90,"hasAlternate":92,"updatedAt":73},"calon-cancer","solid","Solid Tumors","Colon Cancer","Colon cancer is a malignancy that develops in the colon and is part of the broader group of colorectal cancers. Most colon cancers are adenocarcinomas.\nEarly colon cancer may cause no noticeable symptoms and is sometimes detected through colorectal cancer screening or colonoscopy performed for another reason. As the disease progresses, symptoms may include blood in the stool, changes in bowel habits, abdominal pain, anemia, unexplained weight loss, or bowel obstruction.",[68,74,78,82,86],{"key":69,"title":70,"html":71,"icon":72,"updatedAt":73},"","Overview","\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">The colon makes up most of the large intestine and connects the small intestine to the rectum. It plays an important role in absorbing water and forming stool.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cbr\u002F>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Most colon cancers are adenocarcinomas that arise from glandular cells in the colon lining. Some develop gradually from adenomatous polyps or other precancerous lesions, although not every polyp becomes cancer and not every colon cancer has an identifiable polyp stage.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cbr\u002F>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Colon cancer develops through the accumulation of molecular changes over time. Different tumors may follow different biologic pathways, including chromosomal instability, mismatch repair deficiency with microsatellite instability, and other molecular or epigenetic changes.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cbr\u002F>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Right- and left-sided colon cancers can differ in symptoms, biology, and response to some treatments for advanced disease.\u003C\u002Fspan>\u003C\u002Fp>","⚕️","2026-09-19",{"key":69,"title":75,"html":76,"icon":77,"updatedAt":73},"Causes and Risk Factors","\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Colon cancer usually develops through a combination of age-related, genetic, medical, and lifestyle factors rather than from a single cause.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Risk factors include increasing age, a personal or family history of colorectal cancer or advanced adenomas, inflammatory bowel disease, inherited cancer syndromes such as Lynch syndrome and familial adenomatous polyposis, obesity, physical inactivity, smoking, heavy alcohol use, certain dietary patterns, and type 2 diabetes.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Lynch syndrome is associated with inherited abnormalities in DNA mismatch repair genes and is one of the most common hereditary colorectal cancer syndromes. Familial adenomatous polyposis is associated with inherited APC variants and can lead to the development of numerous colorectal adenomas.\u003C\u002Fspan>\u003C\u002Fp>","🧬",{"key":69,"title":79,"html":80,"icon":81,"updatedAt":73},"Signs and Symptoms","\u003Cul class=\" list-paddingleft-2\" style=\"list-style-type: disc;\">\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Early colon cancer may cause no symptoms.\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Possible signs and symptoms include:\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Changes in bowel habits\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Persistent diarrhea or constipation\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Blood in the stool\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Abdominal pain, bloating, or discomfort\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Unexplained anemia\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Fatigue\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Loss of appetite\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Unexplained weight loss\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Persistent changes in stool shape or bowel patterns\u003C\u002Fspan>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">A tumor that significantly narrows the bowel can cause obstruction, with symptoms such as abdominal swelling, cramping pain, inability to pass stool or gas, nausea, or vomiting.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Symptoms can also vary according to tumor location. Right-sided cancers may be more likely to present with chronic blood loss or anemia, whereas left-sided tumors may more often cause changes in bowel habits or obstruction. These patterns are not absolute.\u003C\u002Fspan>\u003C\u002Fp>","📋",{"key":69,"title":83,"html":84,"icon":85,"updatedAt":73},"Diagnosis","\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Colonoscopy with tissue biopsy is the cornerstone of colon cancer diagnosis.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Colonoscopy allows direct examination of the entire colon and enables biopsy of suspicious lesions. It can also identify and remove some precancerous polyps.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">After diagnosis, additional tests are used for staging and treatment planning.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Contrast-enhanced CT of the chest, abdomen, and pelvis is commonly used to evaluate the primary tumor, regional lymph nodes, and distant metastases, particularly in the liver and lungs.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">CEA can be measured before treatment and used as an additional marker during follow-up, but it cannot diagnose colon cancer by itself.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">MMR\u002FMSI testing is important for colorectal cancers because it can help identify patients who may have Lynch syndrome and can influence both adjuvant and metastatic treatment decisions.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">For metastatic disease, molecular testing commonly includes RAS and BRAF, with additional testing for biomarkers such as HER2 and KRAS G12C in appropriate patients.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Staging\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">Colon cancer is primarily staged using the AJCC TNM system.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">T describes how deeply the primary tumor has grown through the bowel wall or into nearby structures. N describes regional lymph node involvement. M indicates distant metastases.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">These factors are combined into stages I through IV.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0px;\">\u003Cspan style=\"font-size: 15px;\">Treatment decisions, however, depend on more than stage alone. In stage II and III disease, factors such as tumor depth, lymph node findings, bowel obstruction or perforation, histologic grade, lymphovascular invasion, and MMR\u002FMSI status can also influence recurrence risk and treatment planning.\u003C\u002Fspan>\u003C\u002Fp>","🩺",{"key":69,"title":87,"html":88,"icon":89,"updatedAt":73},"Treatment","\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cspan class=\"\" style=\"color: rgb(15, 17, 21); background-color: rgb(255, 255, 255);\">Treatment for colon cancer depends on disease stage, tumor location, pathologic and molecular features, presence of distant metastasis, and the patient's overall physical condition.\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr style=\"color: rgb(15, 17, 21);   background-color: rgb(255, 255, 255);\"\u002F>\u003Cspan class=\"\" style=\"color: rgb(15, 17, 21); background-color: rgb(255, 255, 255);\">Unlike rectal cancer, colon cancer generally does not require routine pelvic radiotherapy; for localized disease, treatment mainly centers on surgery and postoperative adjuvant chemotherapy.\u003C\u002Fspan>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cstrong>\u003Cspan style=\"font-size: 16px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cstrong>\u003Cspan style=\"font-size: 16px;\">Very Early Colon Cancer\u003C\u002Fspan>\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Some very early colon cancers arising within polyps can be completely treated by endoscopic removal.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Whether additional surgery is needed depends on pathology findings such as depth of invasion, resection margins, tumor differentiation, lymphovascular invasion, and other high-risk features.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">If the risk of lymph node involvement is considered significant, formal colon resection with regional lymph node removal is generally recommended.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cstrong>\u003Cspan style=\"font-size: 16px;\">Surgery for Localized Colon Cancer\u003C\u002Fspan>\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp>\u003Cstrong>\u003Cspan style=\"font-size: 16px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fstrong>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Surgery is the main treatment for most localized colon cancers.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">The operation generally removes the segment of colon containing the tumor together with the associated regional lymph nodes. The remaining ends of the bowel are reconnected when this can be done safely.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">The extent of surgery depends on tumor location and may include right colectomy, left colectomy, sigmoid colectomy, or other segmental procedures.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Many operations can be performed laparoscopically or with robotic assistance. A permanent stoma is not required for most elective colon cancer surgeries.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Stage I Colon Cancer\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Stage I colon cancer is generally treated with surgery.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Patients who undergo adequate curative resection usually do not require routine postoperative chemotherapy and move into surveillance.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Selected very early cancers confined to a polyp may be adequately treated by complete endoscopic removal when favorable pathology criteria are met.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Stage II Colon Cancer\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>\u003Cbr\u002F>\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Not every patient with stage II colon cancer needs chemotherapy after surgery.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Patients with lower-risk disease may undergo surveillance alone following adequate resection.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Adjuvant chemotherapy may be considered when higher-risk features are present, such as T4 disease, bowel obstruction or perforation, inadequate lymph node sampling, poor differentiation, or lymphovascular or perineural invasion.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">MMR\u002FMSI status is also important because dMMR\u002FMSI-H stage II tumors have distinct biology and may derive different benefit from fluoropyrimidine-based adjuvant chemotherapy.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Stage III Colon Cancer\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>\u003Cbr\u002F>\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Stage III colon cancer involves regional lymph nodes, and standard treatment generally includes curative surgery followed by adjuvant chemotherapy.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Common regimens include oxaliplatin-containing combinations such as FOLFOX or CAPOX.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">The duration of chemotherapy may vary according to recurrence risk, regimen, tolerance, age, and overall health rather than being identical for every patient.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Metastatic Colon Cancer\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>\u003Cbr\u002F>\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">When colon cancer has spread to distant organs, the first question is whether the metastatic disease can be completely removed rather than assuming that all stage IV disease is treated only with medication.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">The liver and lungs are common metastatic sites.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Selected patients with resectable metastases may undergo surgery or other local treatments combined with systemic therapy and may achieve long-term disease control. Some initially unresectable liver metastases may become resectable after systemic therapy.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">For disease that cannot be treated with curative local therapy, systemic treatment is the main approach.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Molecular Testing and Targeted Therapy\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>\u003Cbr\u002F>\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Molecular testing is increasingly important in metastatic colon cancer.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Key biomarkers include RAS, BRAF, MMR\u002FMSI, and, in selected patients, HER2 and KRAS G12C.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Patients with RAS wild-type disease, particularly left-sided primary tumors, may benefit from anti-EGFR therapy such as cetuximab or panitumumab.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">For BRAF V600E–mutated metastatic colorectal cancer, targeted treatment with encorafenib plus cetuximab is an established option in appropriate settings.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">HER2-targeted therapy may be considered for selected HER2-positive tumors.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">For previously treated KRAS G12C–mutated colorectal cancer, combinations of a KRAS G12C inhibitor with an EGFR inhibitor have also entered the treatment landscape.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Immunotherapy\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>\u003Cbr\u002F>\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Immunotherapy is guided primarily by MMR\u002FMSI status rather than simply by whether colon cancer is advanced.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">For metastatic dMMR\u002FMSI-H colorectal cancer, immune checkpoint inhibitors can be highly effective.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Pembrolizumab is an established first-line option for selected patients with treatment-naïve dMMR\u002FMSI-H metastatic colorectal cancer. In KEYNOTE-177, it significantly improved progression-free survival compared with chemotherapy.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Nivolumab plus ipilimumab is another immune-based option in appropriate settings.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 15px;\">For the much more common MSS\u002FpMMR tumors, single-agent checkpoint inhibition generally has limited\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Radiation Therapy\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Radiation therapy has a much smaller role in colon cancer than in rectal cancer.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Because the colon is located within the abdomen and is relatively mobile, routine preoperative or postoperative radiation is generally not part of standard treatment for localized colon cancer.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Radiation may be used selectively for unresectable local disease, local recurrence, bone metastases, bleeding, pain, or other situations requiring local symptom control.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>\u003Cbr\u002F>\u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size: 16px;\">\u003Cstrong>Supportive Care\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Supportive care can be provided throughout the entire course of colon cancer treatment.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Patients may need management of anemia, pain, nausea, diarrhea, constipation, nutritional problems, or treatment-related side effects.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">When bowel obstruction occurs, treatment may include surgery, a temporary or permanent stoma, endoscopic stenting, or other approaches depending on the location of the obstruction and overall treatment plan.\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">\u003Cbr\u002F>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp style=\"margin: 7px 0;\">\u003Cspan style=\"font-size: 15px;\">Palliative care can be provided together with active anticancer treatment.\u003C\u002Fspan>\u003C\u002Fp>","💊",{"author":69,"reviewedBy":69,"lastReviewed":69,"datePublished":69,"citations":91,"disclaimer":69},[],false,1792294354719]