Full-thickness biopsy is reserved in chronic enteropathy when which condition is suspected?

• A. Submucosal disease or neoplasia.
• B. Mucosal disease easily sampled endoscopically.
• C. Liver involvement only.
• D. Skin disease.

Answer: (A)

Depth of pathology matters when evaluating chronic enteropathy. A full-thickness biopsy is used when the problem may lie beyond the mucosa—in the submucosa or deeper layers—such as submucosal disease or neoplasia. Endoscopic sampling typically obtains only mucosal tissue, which can miss lesions confined to deeper layers or infiltrative processes. By taking tissue from all layers of the intestinal wall, a full-thickness biopsy reveals the extent and nature of submucosal or transmural disease, helping diagnose conditions that would be missed with mucosal biopsies. If the disease is primarily mucosal and accessible endoscopically, a full-thickness biopsy isn’t needed. Liver involvement or skin disease fall outside this intestinal-depth concern and aren’t the indications for this procedure.