What is a limitation of plain radiographs in chronic diarrhea evaluation?

What is a limitation of plain radiographs in chronic diarrhea evaluation?

• A. They cannot assess wall thickness or mucosal disease
• B. They are too sensitive to minor changes
• C. They provide excessive detail
• D. They assess only spinal bone

Answer: (A)

Plain abdominal radiographs are good for showing gas patterns, stool burden, and gross distention, but they don’t reveal mucosal details. They cannot reliably assess wall thickness or mucosal disease because subtle changes in the mucosa or wall layers aren’t visible on a simple X-ray. For chronic diarrhea, evaluating mucosal pathology or inflammatory changes requires more sensitive methods like endoscopy with biopsy or cross‑sectional imaging such as CT or MR enterography, which can assess wall thickness and mucosal patterns. The other statements don’t fit because this technique is not unusually sensitive to minor changes, it does not provide excessive detail, and it isn’t limited to viewing only spinal bone in abdominal assessment.

Plain abdominal radiographs are good for showing gas patterns, stool burden, and gross distention, but they don’t reveal mucosal details. They cannot reliably assess wall thickness or mucosal disease because subtle changes in the mucosa or wall layers aren’t visible on a simple X-ray. For chronic diarrhea, evaluating mucosal pathology or inflammatory changes requires more sensitive methods like endoscopy with biopsy or cross‑sectional imaging such as CT or MR enterography, which can assess wall thickness and mucosal patterns. The other statements don’t fit because this technique is not unusually sensitive to minor changes, it does not provide excessive detail, and it isn’t limited to viewing only spinal bone in abdominal assessment.