Which of the following GI complications is most likely to preclude enteral nutrition in the first 2–3 weeks after stem cell transplantation?

• A. Nausea only.
• B. Diarrhea only.
• C. Nausea, vomiting, delayed gastric emptying, and diarrhea.
• D. No GI complications.

Answer: (C)

Enteral feeding depends on a GI tract that can safely tolerate and transit feeds. After stem cell transplantation, the gut is often injured by conditioning therapy, so GI function can be profoundly impaired. When there is nausea and vomiting, the upper GI tract is not ready to hold or move feeds, increasing the risk of aspiration. Delayed gastric emptying further compounds this, as feeds sit in the stomach and are more likely to regurgitate. Diarrhea indicates lower GI dysfunction with large stool losses and potential electrolyte disturbances, making it hard to maintain hydration and proper nutrient absorption. When all of these issues occur together, the gut cannot safely or effectively receive enteral nutrition in the early post-transplant period, which is why this combination best precludes EN in the first 2–3 weeks. If only one symptom were present, there might be ways to adjust or still use enteral feeds, but the combination described signals significant feeding intolerance.