Symptoms and pictures of colorectal cancer

The clinical features of rectal malignancy are mainly blood in the stool and changes in bowel habits. When the cancer is confined to the rectal mucosa, blood in the stool is the only early symptom, accounting for 85%. Unfortunately, it is often not taken seriously by patients. At that time, a rectal finger examination can often touch a mass. In addition to the common loss of appetite and weight loss, what are the symptoms of colorectal cancer in patients with mid- and late-stage rectal malignancy?

First: Gradually worsening abdominal distension and pain. The cause is intestinal dysfunction or intestinal obstruction. The location is mostly concentrated in the middle and lower abdomen, mostly dull pain or distending pain, and there is a tendency to gradually worsen.

Second: intermittent blood in the stool. Because the lesion is close to the anus, the blood is often bright red or dark red, and the blood is often separated from the stool. Only when the amount of bleeding is large, the stool will be brown-red and jam-like. Among patients with right-sided colon cancer, 36.5% have visible blood in the stool.

Third: Anemia. When long-term chronic blood loss exceeds the body's hematopoietic compensatory function, the patient may develop anemia, and as the disease progresses, the anemia worsens.

Fourth: Changes in bowel habits and stool characteristics. Patients with rectal cancer may have more bowel movements, but not much each time, or even no stool at all, only some mucus and blood, and a feeling of incomplete bowel movements. Changes in bowel habits and frequency, as well as constipation or unexplained diarrhea may occur only when the colorectal tumor is relatively large and has erosion, ulceration or infection.