Colon cancer symptoms: stages and treatment process

Estimated reading time: 11 minutes 17 seconds

What You Need to Know About Colon Cancer

Some changes related to the digestive system can sometimes be mistaken for simple intestinal problems. However, it is very important to be cautious, especially if symptoms such as prolonged constipation, blood in the stool, abdominal pain, or unexplained weight loss occur, as these may be associated with colon cancer symptoms.

Since colon cancer is often a slowly progressing disease, it may not cause noticeable symptoms in the early stages. Therefore, it is important to pay attention to changes in bowel habits and not neglect regular check-ups.

In this article, we discuss frequently asked topics, starting with what colon cancer is, its stages, symptoms, treatment methods, and the post-treatment process.

What is colon cancer?

Colon cancer is a type of cancer that occurs when the cells lining the inner surface of the large intestine multiply uncontrollably. It usually begins when small polyps developing on the intestinal lining undergo changes over time. Although not every polyp turns into cancer, some types may become risky over the years.

Since colon cancer often progresses slowly, it may not be noticed in the early stages. Therefore, regular check-ups and screening tests play an important role in early diagnosis. As we will discuss later in this article, symptoms may gradually appear as the disease progresses. On the other hand, colon cancer is most commonly seen in the final part of the large intestine, areas close to the rectum, and in polyps developing on the intestinal lining.

What causes colon cancer?

Colon cancer does not appear suddenly; it may begin with changes occurring in certain polyps formed on the intestinal lining over many years. Although not every polyp becomes cancerous, some types may pose a risk over time.

The development of colon cancer cannot be attributed to a single cause. It is generally believed that genetic predisposition, lifestyle, and environmental factors all play a role together. Habits that negatively affect intestinal health for a long period may particularly contribute to increased risk.

Some factors that may increase the risk of colon cancer include:

• Advanced age
• Family history of colon cancer
• Low-fiber diet
• Excessive processed food consumption
• Excessive red meat consumption
• Smoking and alcohol use
• Sedentary lifestyle
• Obesity
• Long-term intestinal inflammation

Chronic intestinal diseases, especially conditions such as ulcerative colitis and Crohn’s disease, may be considered risk factors because they can cause long-term damage to the intestinal lining. In some individuals, genetic predisposition may be more pronounced.

Especially if there is a family history of colon cancer, screening programs may be planned at an earlier age. On the other hand, it should not be forgotten that colon cancer can also develop in people without known risk factors.

Colon cancer symptoms

Colon cancer symptoms may vary depending on the location and stage of the disease. Especially in the early period, some individuals may not have noticeable complaints. Therefore, symptoms often develop gradually and can initially be confused with other digestive problems. The most common symptoms of colon cancer include:

• Changes in bowel habits
• Long-lasting constipation or diarrhea
• Blood in the stool
• Abdominal pain and bloating
• Feeling of incomplete bowel emptying after using the toilet
• Unexplained weight loss
• Weakness and fatigue
• Loss of appetite

However, these symptoms are not specific only to colon cancer. Different digestive system problems such as hemorrhoids, intestinal infections, or irritable bowel syndrome can also cause similar complaints. Therefore, expert evaluation should not be delayed, especially in cases of prolonged bowel habit changes or blood in the stool.

What are the stages of colon cancer?

Colon cancer stages indicate how far the disease has progressed within the intestinal wall and whether it has spread to other parts of the body. These stages are highly important when evaluating treatment planning and disease progression. Colon cancer generally consists of four stages:

• Stage 1: Cancer is limited to the inner layers of the intestinal wall. It is generally considered an early stage and spread to nearby lymph nodes is not seen.
• Stage 2: Cancer has progressed into deeper layers of the intestinal wall. However, it may not have spread to nearby lymph nodes.
• Stage 3: Cancer cells have spread to nearby lymph nodes. At this stage, progression beyond the intestine may occur.
• Stage 4: Cancer has spread to organs outside the colon. The liver, lungs, or tissues inside the abdomen are most commonly affected. This stage is considered advanced-stage colon cancer.

Colon cancer staging is not based solely on symptoms. Along with a physician’s evaluation, colonoscopy, biopsy, MRI, and other imaging methods are used to determine the extent of disease spread.

What are the symptoms of stage 1 colon cancer?

When colon cancer is at stage 1, it is generally limited to the inner layers of the intestinal wall. Therefore, symptoms may be mild or may not be noticed at all in some individuals. The fact that the disease can progress without symptoms at this stage is one of the strongest reasons why regular screening is important.

Symptoms of stage 1 colon cancer may include:

• Occasional constipation or diarrhea
• Blood in the stool
• Mild abdominal discomfort
• Gas and bloating
• Feeling of incomplete bowel emptying after using the toilet
• Mild fatigue

In some individuals, blood in the stool may appear bright red, while in others hidden bleeding may only lead to anemia. Therefore, unexplained iron deficiency or long-lasting fatigue should also be taken into consideration.

What are the symptoms of stage 3 colon cancer?

When colon cancer reaches stage 3, the disease may no longer be limited to the intestinal wall and may also spread to nearby lymph nodes. Therefore, symptoms generally become more noticeable compared to earlier stages and may affect daily life more significantly.

Symptoms of stage 3 colon cancer may include:

• Persistent or frequently recurring abdominal pain
• Noticeable changes in bowel habits
• Long-lasting constipation or diarrhea
• Blood in the stool
• Significant weakness and fatigue
• Unexplained weight loss
• Loss of appetite
• Abdominal bloating

Since the disease has spread to lymph nodes at this stage, symptoms may generally be more prolonged and intense. However, symptom severity can vary from person to person. In some individuals, symptoms progress slowly, while in others they may become apparent within a shorter period.

What are the symptoms of stage 4 colon cancer?

Stage 4 colon cancer is considered advanced-stage colon cancer, and symptoms generally become more severe. Cancer most commonly spreads to the liver, lungs, abdominal lining, or distant lymph nodes.

Symptoms seen in end-stage colon cancer may not remain limited to the intestinal system. Different complaints may occur depending on where the disease has spread.

Symptoms of stage 4 colon cancer include:

• Severe and persistent abdominal pain
• Significant weight loss
• Persistent weakness and fatigue
• Loss of appetite
• Blood in the stool
• Long-lasting constipation or diarrhea
• Abdominal swelling
• Development of anemia
• Feeling of abdominal fullness
• Yellowing of the skin
• Pain in the liver area

Today, different treatment options such as chemotherapy, targeted therapies, and certain surgical methods can help control the disease. Therefore, even in advanced stages, treatment planning is personalized.

Which methods are used to treat colon cancer?

Colon cancer treatment is planned according to the stage of the disease, the location of the tumor, the extent of spread, and the person’s overall health condition. Therefore, the same treatment method may not be used for every patient.

The main goal of treatment is to control cancerous tissue, stop disease spread, and preserve quality of life.

The most commonly used treatment methods include:

• Surgical treatment
• Chemotherapy
• Radiotherapy
• Immunotherapy

In early-stage colon cancer, surgical treatment is often the primary approach. During surgery, the affected bowel segment is removed and nearby lymph nodes may also be assessed when necessary. Depending on the disease stage, bowel ends may be reconnected or, in some cases, a temporary or permanent stoma may be required.

In advanced-stage colon cancer, newer treatment options such as targeted therapies and immunotherapy may also be considered. These methods are planned according to certain characteristics of cancer cells and may not be suitable for every patient.

What lifestyle changes should be made after colon cancer surgery?

Some lifestyle changes after colon cancer surgery may support recovery and help individuals adapt more comfortably to daily life. Although the recovery process varies from person to person, special attention should be given to nutrition, bowel habits, and physical activity.

Lifestyle changes that may be considered after surgery include:

• Maintaining a balanced and controlled fiber intake
• Paying attention to adequate water consumption
• Limiting heavy and difficult-to-digest foods
• Engaging in regular walks and light physical activity
• Avoiding smoking and alcohol use
• Establishing a regular sleep routine
• Keeping up with medical check-ups

Psychological support may also be important after surgery. Long treatment processes may increase anxiety, stress, or fatigue in some individuals. Therefore, attention should be paid not only to physical recovery but also to emotional well-being.

What is the survival chance for stage 4 colon cancer?

When colon cancer reaches stage 4, the disease has spread to organs outside the colon. Therefore, treatment can become more complex compared to earlier stages. However, stage 4 colon cancer does not always mean that treatment is impossible.

Thanks to advances in treatment methods, disease progression can be slowed, controlled, and survival may be prolonged in some individuals.

Factors affecting the survival chances in stage 4 colon cancer include:

• Which organs the cancer has spread to
• The extent of spread
• Overall health condition
• Response to treatment
• Age and presence of additional diseases
• Biological characteristics of the tumor

At this stage, preserving quality of life becomes as important as disease control. Pain management, nutritional support, psychological support, and regular follow-up are among the essential parts of treatment. The most accurate evaluation regarding treatment options should be made by an oncology specialist.

Frequently Asked Questions

Does colon cancer cause death?

Colon cancer is a serious disease that can become life-threatening if left untreated or if it cannot be controlled in advanced stages. However, it would not be accurate to say that every person diagnosed with colon cancer will experience the same outcome.

The stage at which the disease is diagnosed, the extent of spread, and the response to treatment can significantly influence the course of the disease. Especially in cases detected early, treatment success rates are generally higher. Through regular screenings, the chance of controlling the disease with surgery and other treatment methods increases when detected before spreading.

Where is colon cancer pain felt?

Colon cancer pain is most commonly felt in the abdominal region. However, the location and severity of pain may vary depending on the tumor location, stage of the disease, and its effects on the intestine. Especially in early stages, pain may be mild or occur intermittently.

Pain in colon cancer may most commonly be felt in:

• Lower abdomen
• Around the belly button
• Right or left side of the abdomen
• Groin area
• Cramp-like areas along the intestine

If colon cancer spreads to other organs such as the liver, pain may not remain limited to the intestinal region. For example, liver involvement may cause fullness or pain in the upper right abdomen. However, abdominal pain alone does not mean colon cancer. Gas problems, irritable bowel syndrome, intestinal infections, or other digestive disorders may also cause similar symptoms.

What does stool color look like in colon cancer?

Stool color in colon cancer may vary depending on the location of the tumor and the amount of bleeding. Bleeding within the intestine may cause noticeable changes in stool color. However, stool color changes are not unique to colon cancer and can also occur in various digestive diseases.

Possible stool changes in colon cancer include:

• Bright red blood in the stool
• Dark red or maroon-colored stool
• Very dark or black stool
• Stool becoming thinner than usual

Tumors located closer to the lower part of the colon may be more likely to cause bright red bleeding. Bleeding from higher regions may result in darker or tar-like black stools.

Does Colon Cancer Cause Weight Loss?

Colon cancer can cause significant weight loss in some individuals. Especially as the disease progresses, unexplained weight loss can occur due to decreased appetite, effects on the digestive system, and disruption of the body’s energy balance. Therefore, unexplained weight loss is considered one of the symptoms to be taken into account in colon cancer.

However, weight loss alone does not necessarily mean colon cancer. Thyroid diseases, various digestive system problems, infections, or other types of cancer can also lead to similar weight loss.

Doctors at Aktif International Hospital Say:

Regarding weight loss, when this issue is considered in relation to colon cancer, the crucial point is when to seek expert help.

There is a point that Aktif International Hospital physicians emphasize. If a person is losing weight without dieting and this is accompanied by symptoms such as changes in bowel habits, blood in the stool, or persistent fatigue, it is extremely important to seek expert evaluation without delay.

What is the life expectancy for colon cancer?

Life expectancy in colon cancer can vary from person to person. The stage of the disease, spread, age, general health condition, and response to treatment all directly affect the process. Therefore, it is not accurate to speak of one fixed life expectancy for everyone.

Especially in colon cancer detected at an early stage, treatment success rates are generally higher. Many individuals can continue living for many years after treatment when the disease is still confined to the intestine. Therefore, early diagnosis is critically important in colon cancer.