Colorectal cancer is the most common malignant tumor in the gastrointestinal tract and its incidence rate is only second to stomach cancer and esophageal cancer. Most of patients with colorectal cancer are over 40 years old and those who are under 30 accounts for 15%, besides, male patients are more commonly seen. In spite of high incidence, people know little about the symptoms of colorectal cancer, so cancer experts from Modern Cancer Hospital Guangzhou will introduce them as following:
Main Symptoms Of Colorectal cancer
Normally colorectal cancer in early stage would mainly present the symptom of painless stools with blood and the blood is red or fresh, which is similar to the symptom of early internal hemorrhoid.
After that is the change in bowel movement. Some patients develop constipation and diarrhea while some would have tenesmus. Patients would defecate mucopurulent and bloody stools, at the same time the shape of stools become slender.
Apart from this, stenosis of bowel cavity occurs because of cancer infiltration around bowel wall. If this occurs in juncture of rectum and sigmoid colon, the cancer mostly is scirrhus of stenotic type, from which can cause bowel obstruction and irritation and so on.
When colorectal cancer develops to advanced stage, the blood in stool changes to dark red and the stools present mucous bloody stools or bloody purulent stools.
Besides the symptoms mentioned above in adavaced stage, colorectal cancer also encroaches on tissues and organs around such as bladder and prostate to cause frequency, urgency and difficulty of urination. A patient can even develop pain in sacral and waist when the cancer attacks lumbosacral plexus.