Short-bowel syndrome and intestinal failure — branching viva

Opening — framing the problem

The examiner begins: a baby born at 27 weeks develops necrotising enterocolitis and undergoes a massive small-bowel resection, leaving a 35-centimetre jejunal remnant ending in a jejunostomy with the colon disconnected. The stoma output is 60 mL/kg/day and the weight has fallen. Talk me through your approach. [1]

I would frame this as intestinal failure from short-bowel syndrome, with the end-jejunostomy configuration the single most important prognostic feature. My priorities would be to stabilise the child on parenteral nutrition, to actively measure and replace the sodium-rich stoma losses, to start trophic enteral feeding to drive adaptation, to protect the immature liver by a lipid and sepsis strategy, and to involve the intestinal rehabilitation team early, because the loss of colon continuity puts this child at high risk of needing a prolonged programme and possibly transplant. [1] [2]

Branch A — definition and classification

Distinguish short-bowel syndrome from intestinal failure for me. Why does this configuration carry a poor prognosis? [1]

Short-bowel syndrome is the malabsorption that follows massive small-intestinal resection, an anatomical event with a functional consequence. Intestinal failure is the broader state in which the gut cannot sustain growth and hydration, so the child needs parenteral support. This child has both. The end-jejunostomy, with the colon disconnected, carries the poorest prognosis of the three anatomical types because the child loses almost all water and sodium through the stoma, lacks the colon's absorptive and trophic role, and loses the source of glucagon-like peptide 2 from the distal ileum and proximal colon that drives adaptation. The jejunoileal configuration with an intact colon and ileocaecal valve would have the best outlook. [1]

Branch B — the sodium principle

The stoma output is 60 mL/kg/day and the serum sodium is normal, but the weight is falling. Explain what is happening and what you will do. [2]

This is the sodium principle in action. A high-output stoma above about 40 to 50 mL/kg/day is a sodium-wasting state. The effluent is rich in sodium at roughly 90 to 100 mmol/L, so the child is in chronic negative sodium balance even though the serum sodium looks normal, because the body depletes its total body sodium while defending the serum concentration. Chronic sodium depletion suppresses growth independent of the calorie count. The correct move is the opposite of restricting fluid: I would measure the stoma output and its sodium content, and replace the losses millilitre for millilitre with an appropriate sodium-containing solution, while advancing enteral feeding rather than withholding it. [2]

Branch C — adaptation and the trophic gut

Why do you keep feeding this child by gut when most calories come from the line? [3]

Because enteral nutrition is trophic, not merely nutritive. Contact between luminal nutrients and the mucosa stimulates villous lengthening and crypt hyperplasia and triggers the release of trophic hormones, especially glucagon-like peptide 2 from the L-cells of the distal ileum and proximal colon. This drives the structural and functional adaptation that can multiply absorptive capacity many times over months. Withholding enteral feeding denies the gut the very stimulus it needs to adapt, which is why every short-bowel service feeds the gut early and advances persistently. [1] [3]

Branch D — IFALD and the lipid strategy

Now the conjugated bilirubin is rising. What is this and how do you respond? [5]

This is intestinal failure-associated liver disease, or IFALD, and a rising conjugated bilirubin in an infant on parenteral nutrition is IFALD until proven otherwise. The two dominant modifiable drivers are the parenteral lipid load and recurrent sepsis. I would reduce or modify the lipid, using lipid restriction, a mixed emulsion such as SMOFlipid, or an omega-3 fish-oil-based emulsion, because soy-based emulsions rich in phytosterols drive cholestasis. I would search for and treat any line infection with strict asepsis and appropriate antibiotics, and I would advance enteral feeding to restore the trophic and pro-kinetic stimulus to bile flow. I would also actively exclude biliary atresia in a cholestatic neonate, because a short-bowel infant needs the same biliary atresia work-up as any cholestatic baby. [5] [6]

Branch E — the older child and the rehabilitation ladder

Now a 4-year-old with short bowel from volvulus, with a jejunal remnant joined to an intact colon, is on home parenteral nutrition. Her weight has stalled and a contrast study shows a dilated, dysfunctional segment. What is your plan? [8]

I would first measure a plasma citrulline to gauge her functional enterocyte mass, with a low level reflecting reduced enterocyte mass and a rising trend over time paralleling adaptation. I would consider teduglutide at 0.05 mg/kg subcutaneously once daily, an analogue of glucagon-like peptide 2 resistant to breakdown, which the Chiba 2023 paediatric study showed reduces parenteral support in infants and children. For the dilated, dysfunctional segment, I would discuss a serial transverse enteroplasty, which applies alternating stapler firings across the dilated loop to narrow and lengthen it, converting it into a longer, more functional channel; the multicentre long-term data show meaningful parenteral nutrition reduction, and repeat STEP can help if it dilates again. [3] [8] [11]

Closing — the indications for transplant

When would you refer this child for intestinal transplant? [10]

Transplant is reserved for a narrow set of indications. I would refer if she develops irreversible intestinal failure-associated liver disease that threatens her life, if she loses central venous access sites so that parenteral nutrition can no longer be delivered safely, or if she has recurrent life-threatening central-line bloodstream infection. With liver failure she would need a combined liver-intestine graft; with a spared liver, an isolated intestinal graft may suffice. The decision is made in a specialist centre weighing the audit of lines, liver and sepsis, and the aim is to transplant electively before the liver fails irreversibly, because an emergency transplant in a child with multi-organ failure has a worse outcome. [10] [5]