Symptoms of colon cancer
3rd August 2018
Cases of colon cancer are at the 6th or 7th places in frequency among other localisations, accounting for about 4 to 5% of all cancers. The first place (70-80% of all types of intestinal cancer) among the localisations in the intestine belongs to rectal cancer.
Since rectal cancer usually develops because of a previous chronic precancerous disease, its symptoms, especially the early ones, are often nonspecific and are no different from what the patient had to face before. That is why people with chronic intestinal pathology, as well as those who are at risk for this disease by other parameters, should undergo a regular medical examination in order not to miss the onset of malignant tumour development.
Symptoms of colon cancer at different stages of the disease
As mentioned above, the first symptoms of colorectal cancer are numerous, but non-specific, which causes a tumour to manifest itself as a variety of other bowel diseases. Signs of colon cancer:
- general weakness and increased fatigue;
- disruption of the intestinal function;
- a feeling of discomfort in the abdomen, bloating, flatulence, a sense of incomplete bowel emptying after the act of defecation;
- blood in the faeces.
- Symptoms of colon cancer at the initial stage of disease can be expressed not brightly and have a transient nature, but their regular appearance should alert and cause an examination. The presence of blood in the faeces is especially dangerous. Strictly speaking, this symptom does not refer to very early signs but indicates a tumour that has already developed, and often it is the first that attracts the patient’s attention.
- In general, slow development, and, accordingly, a gradual increase in symptoms characterise cancer of the rectum.
- Late symptoms of colon cancer:
- blood in the stool (if this sign has not attracted attention before, then bleeding cannot be ignored in the later stages);
- impaired bowel function;
- false desires for emptying, and the sensation of a foreign object in the rectum after going to the toilet;
- partial or complete obstruction of the intestine;
- cramping pain;
- excretion of pus and mucus;
- weakness, fatigue, rapid weight loss.
The late signs of rectal cancer are associated not only with the growth of a tumour but also with the fact that its decay products lead to the intoxication of the body. This tumour is the reason for a sharp deterioration in health, a decrease in appetite, a decline in strength, pallor, etc.