Why might endoscopy not sample all diseased areas?

Why might endoscopy not sample all diseased areas?

• A. Endoscopy can reach every area easily.
• B. Disease can be patchy or segmental; some affected areas may be beyond reach of endoscope, requiring surgical biopsy or full-thickness sampling.
• C. Endoscopy samples every area automatically.
• D. Endoscopy is always sufficient to determine the extent of disease.

Answer: (B)

Endoscopy is a valuable tool for visualizing and sampling the mucosa of accessible parts of the GI tract, but it has limits. Chronic enteropathy can be patchy or segmental, with disease confined to certain areas that may lie beyond where the endoscope can reach. In such cases, relying on endoscopic biopsies can miss affected tissue. Additionally, endoscopic sampling typically targets mucosa (and sometimes submucosa) and may not capture deeper, transmural involvement. To assess the full extent of disease, surgical biopsy or full-thickness sampling may be necessary. This is why endoscopy might not sample all diseased areas.

Endoscopy is a valuable tool for visualizing and sampling the mucosa of accessible parts of the GI tract, but it has limits. Chronic enteropathy can be patchy or segmental, with disease confined to certain areas that may lie beyond where the endoscope can reach. In such cases, relying on endoscopic biopsies can miss affected tissue. Additionally, endoscopic sampling typically targets mucosa (and sometimes submucosa) and may not capture deeper, transmural involvement. To assess the full extent of disease, surgical biopsy or full-thickness sampling may be necessary. This is why endoscopy might not sample all diseased areas.