In progressive stages of rectal disease, weight loss is common, followed by the escape of blood, mucus, and pus without feces. Deep-seated pain in the pelvis and cachexia are also indicative. If there's a stricture nearly occluding the lumen, symptoms include constipation alternating with diarrhea, intermittent hemorrhage, abdominal pain, distention, emaciation, vomiting, and obstruction. The odor of cancer becomes characteristic in later stages.
<Callout type="important" title="Critical Symptoms">In advanced stages, the presence of blood, mucus, and pus without feces is a critical indicator of rectal disease.</Callout>
Diagnosis relies on symptoms and physical examination, revealing a relaxed, patulous anus darker than surrounding skin due to venous obstruction. An accurate conception must be obtained with finger and proctoscope regarding the lesion's location, size, color, consistency, and shape. The growth bleeds easily upon touch.
<Callout type="risk" title="Risk of Bleeding">Digital examination will likely cause hemorrhage due to the tumor’s tendency to bleed easily.</Callout>
Palpation for enlarged glands in the sacral hollow is crucial; inguinal glands should also be investigated, especially if near the anus. In late stages, secondary deposits in the liver or other organs may appear.
Differential diagnosis must exclude tuberculous ulceration, extensive inflammatory exudate about a blind internal fistula, polypi, villous tumor, simple stricture, and gumma. Each condition has distinct characteristics that differentiate it from rectal cancer.
Sarcoma of the rectum is a disease of later life with tumors varying in size and color but generally hard to touch. They grow rapidly and involve lymphatic glands early on. Metastases occur early as well.
Key Takeaways
- Recognize critical symptoms such as blood, mucus, and pus without feces in advanced stages of rectal disease.
- Accurate physical examination is crucial for diagnosing rectal cancer.
- Early detection through palpation and proctoscopy can prevent rapid tumor growth.
Practical Tips
- Use a proctoscope to accurately assess the lesion's characteristics.
- Palpate the sacral hollow and inguinal glands for enlarged lymph nodes.
- Differentiate rectal cancer from other conditions through specific symptoms and examination findings.
Warnings & Risks
- Digital examination can cause significant bleeding due to the tumor’s fragility.
- Early metastasis is common in sarcoma of the rectum, necessitating prompt diagnosis and treatment.
Modern Application
While this chapter focuses on diagnosing rectal cancer through physical symptoms and examinations that are still relevant today, modern diagnostic tools like imaging scans and biopsies have greatly improved accuracy. Understanding historical methods can provide valuable context for recognizing early signs of disease.
Frequently Asked Questions
Q: What are the key symptoms to look out for in advanced stages of rectal cancer?
In advanced stages, critical symptoms include blood, mucus, and pus without feces, deep-seated pain in the pelvis, emaciation, vomiting, and obstruction.
Q: Why is digital examination risky when diagnosing rectal cancer?
Digital examination can cause significant bleeding due to the tumor’s tendency to bleed easily on touch. This risk underscores the importance of careful handling during physical exams.
Q: What conditions must be excluded in differential diagnosis for rectal cancer?
Conditions such as tuberculous ulceration, extensive inflammatory exudate about a blind internal fistula, polypi, villous tumor, simple stricture, and gumma must be excluded to accurately diagnose rectal cancer.