Colorectal Cancer: Q&A
1. What are the early symptoms of colorectal cancer?
Early-stage colorectal cancer may be asymptomatic; symptoms can include bloody stools, changes in bowel habits, abdominal pain, and abdominal masses.Right-sided colon cancer often presents with anemia and weight loss, while left-sided colon cancer is prone to causing intestinal obstruction.
2. What are the screening methods for colorectal cancer?
Screening for colorectal cancer includes fecal occult blood tests, fecal DNA testing, and colonoscopy.Colonoscopy is the gold standard for diagnosis, allowing for the detection and removal of precancerous polyps.
3. What are the surgical treatment options for colorectal cancer?
Surgery for colorectal cancer requires resection of the intestinal segment containing the tumor and the regional lymph nodes.Procedures such as right hemicolectomy, left hemicolectomy, or anterior resection of the rectum are selected based on the tumor's location.
4. What is minimally invasive treatment for colorectal cancer?
Laparoscopic colectomy involves bowel segment resection and lymph node dissection performed through small abdominal wall incisions; it is the standard minimally invasive approach.Robot-assisted surgery allows for greater precision.
5. What are the chemotherapy and targeted therapy options for colorectal cancer?
Adjuvant chemotherapy can reduce the risk of postoperative recurrence; regimens containing oxaliplatin are commonly used.For patients with advanced disease, combining chemotherapy with targeted drugs such as bevacizumab or cetuximab can prolong survival.
6. Why are regular colonoscopy follow-ups needed after surgery for colorectal cancer?
The risk of recurrence persists after colorectal cancer surgery, requiring regular colonoscopy follow-ups to monitor for local recurrence and metachronous new tumors.Colonoscopy is performed every 6–12 months during the first two years post-surgery.
7. How to prevent colorectal cancer?
Maintain a healthy weight, increase dietary fiber intake, and reduce consumption of red and processed meats.Engage in regular exercise, quit smoking, and limit alcohol intake.Undergo regular colonoscopy screening starting at age 50, or earlier if there is a family history.
