28/04/2026
As a doctor I want to tell you that it's just a few patients know about malignant colon tumors. Symptoms can vary significantly depending on where the tumor is located inside the colon. This variation is one of the main reasons why many people confuse the initial signs or attribute them to common digestive problems, delaying diagnosis.
The image depicts a malignant tumor growing inside the colon, but what is truly important is to understand that the colon does not behave the same in all its segments, and therefore, neither do the symptoms.
🔹 Malignant tumor of the right side of the colon
Tumors that develop in the blind or ascending colon are usually silent and unspecific. This is because this area has a wider caliber and the f***s are more fluid, so the tumor can grow long before it generates obstruction.
His most characteristic symptoms include:
- Melena (darkness due to the presence of precious liquid hematic digested).
- Iron deficiency anemia due to constant microscopic bleeding.
- Chronic fatigue, palpitations or dizziness related to anemia.
- General discomfort or progressive weight loss.
These are symptoms so vague that many patients believe it's gastritis, stress or accumulated fatigue.
🔹 Malignant tumor of the left side of the colon
When the tumor is located in the descending colon or sigmoid, the symptoms are more obvious. In this segment, the intestine is narrower and the f***s already have more consistency, so even small tumors can generate obstruction.
The most common symptoms are:
- Abdominal Stretch.
- Constipation or marked changes in bowel habit.
- Hematochezia (presence of red hematic precious fluid in the f***s).
- Colic pain, sensation of incomplete evacuation and, in more advanced cases, signs of bowel obstruction.
These symptoms usually get more attention, but unfortunately they often appear when the tumor is already considerable in size.
Understanding these differences is crucial because it allows you to identify warning signs that, although they may seem small, can save lives. Early detection through colonoscopy continues to be a fundamental tool to detect precancerous polyps and prevent their progression.
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Essential Reminder: The information presented is academic and educational. It does not constitute a medical consultation, nor should it be used for self-treatment. If you have discomfort or concerns, consult your trusted physician.r