Related Experiment Videos
[Colorectal cancer. Location dependent symptoms?]
M Synnestvedt1, O Meen, B Hofstad
1Medisinsk avdeling, Ullevål sykehus, Oslo.
Summary
Red blood in stool and changes in bowel habits are key indicators for left colonic and rectal cancers. Some classical symptoms, however, are not specific to cancer location.
Area of Science:
- Gastroenterology
- Oncology
- Clinical Medicine
Context:
- Colorectal cancer diagnosis relies on symptom interpretation.
- Classical symptoms are often attributed to specific locations within the colorectum.
- Variations in symptom presentation can complicate diagnosis.
Purpose:
- To evaluate the localization specificity of classical colorectal cancer symptoms.
- To compare observed symptoms with textbook descriptions for left colonic, right colonic, and rectal adenocarcinomas.
- To determine if symptom patterns can guide further diagnostic examinations.
Summary:
- Red blood in feces and altered stool patterns were specific to left colonic and rectal cancers.
- Tenesmus, mucous stools, and defecation pain were specific to rectal cancer.
- Symptoms like melena, diarrhea, weight loss, and general weakness were not found to be location-specific, challenging some textbook claims.
Impact:
- Findings support most textbook symptom localizations for colorectal cancer.
- Certain symptoms can help prioritize further investigations when total colonoscopy is not feasible.
- Highlights discrepancies between classical teaching and clinical observation for specific colorectal cancer symptoms.