Left Lower Abdominal Pain: Could It Be Rectal Cancer? - Gastroenterology and Hepatology

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Left lower abdominal pain can arise from various causes, and while it is understandable to be concerned about serious conditions such as rectal cancer, it is essential to consider a comprehensive evaluation of your symptoms and medical history. Based on the symptoms you've described—persistent left lower abdominal pain, changes in bowel habits (increased frequency and watery stools), fatigue, dizziness, and skin changes—it is crucial to approach this situation methodically.

Firstly, rectal cancer can present with symptoms such as changes in bowel habits, rectal bleeding, abdominal pain, and unexplained weight loss. However, many of these symptoms can also be associated with less severe gastrointestinal issues, such as infections, inflammatory bowel disease, or even functional gastrointestinal disorders. The presence of mucus in your stools and the watery consistency may suggest an inflammatory process or an infection, which could be contributing to your symptoms.

Given your symptoms, it is advisable to undergo a thorough evaluation. Here are some recommended steps:
1. Colonoscopy: Since you are experiencing significant changes in your bowel habits and persistent abdominal pain, a colonoscopy is a critical diagnostic tool. It allows direct visualization of the colon and rectum, enabling the detection of polyps, tumors, or other abnormalities. If any suspicious lesions are found, biopsies can be taken for histopathological examination.

2. Imaging Studies: Depending on your physician's assessment, imaging studies such as a CT scan of the abdomen and pelvis may be warranted. This can help identify any masses, lymphadenopathy, or other structural abnormalities that may not be visible through a colonoscopy.

3. Blood Tests: While you mentioned that blood tests from the ENT and emergency department did not reveal any issues, it may be beneficial to have specific tests done, including a complete blood count (CBC) to check for anemia, and tumor markers such as CEA (carcinoembryonic antigen), which can be elevated in colorectal cancers.

4. Skin Changes: The skin changes you mentioned, particularly the darkening and itching at the back of your neck, could be indicative of a condition known as acanthosis nigricans, which is often associated with insulin resistance and can sometimes be linked to malignancies. It would be prudent to discuss these changes with your healthcare provider, as they may warrant further investigation.

5. Referral to Specialists: Given the complexity of your symptoms, a referral to a gastroenterologist would be beneficial. They can provide specialized care and further evaluate your gastrointestinal symptoms.

In summary, while your symptoms could potentially be associated with rectal cancer, they could also stem from a variety of other conditions. It is essential to pursue a thorough evaluation with appropriate diagnostic tests to arrive at an accurate diagnosis. Early detection and intervention are key in managing any potential malignancy effectively. Please ensure you communicate all your symptoms and concerns with your healthcare provider, as they can guide you through the necessary steps for diagnosis and treatment.