FCPS Paediatrics TOACS · Interactive Station SURGICAL EMERGENCY
🩺 Bilious Vomiting in a 3-Day-Old Neonate — Malrotation with Midgut Volvulus, upper GI series (Corkscrew sign), Ladd's procedure, emergency surgical referral
📚 Paeds Online – paeds.online
⚕️ OBSERVED STATION · CPSP FORMAT · 8 MINUTES · SEPARATE TABS · CLINICAL IMAGE INCLUDED
📖 Problem-oriented Clinical Scenario + Photograph
👶🏻 Clinical Scenario (read aloud – 2 min):
A 3-day-old term male neonate is brought to the emergency department by his parents with a history of bilious (green) vomiting for the past 12 hours. The infant was born via normal vaginal delivery at 39 weeks with a birth weight of 3.2 kg. He passed meconium on day 1 and was discharged home on day 2. Over the last 12 hours, he has had 4-5 episodes of bilious emesis. He is becoming progressively irritable, lethargic, and refuses feeds. The parents are extremely anxious. On examination, the infant appears unwell, pale, and has a distended, tender abdomen. There is no visible peristalsis. A clinical photograph of the infant's abdomen is shown. The parents ask, "What is wrong with our baby? Why is he vomiting green?"
A 3-day-old term male neonate is brought to the emergency department by his parents with a history of bilious (green) vomiting for the past 12 hours. The infant was born via normal vaginal delivery at 39 weeks with a birth weight of 3.2 kg. He passed meconium on day 1 and was discharged home on day 2. Over the last 12 hours, he has had 4-5 episodes of bilious emesis. He is becoming progressively irritable, lethargic, and refuses feeds. The parents are extremely anxious. On examination, the infant appears unwell, pale, and has a distended, tender abdomen. There is no visible peristalsis. A clinical photograph of the infant's abdomen is shown. The parents ask, "What is wrong with our baby? Why is he vomiting green?"
🔍 Figure 1: Distended, tender abdomen in a 3-day-old neonate with bilious vomiting. Note the pallor and ill appearance.
💡 Examiner instruction (interactive - SURGICAL EMERGENCY): The candidate must immediately recognize that bilious vomiting in a neonate is malrotation with midgut volvulus until proven otherwise. The candidate should describe the typical radiological findings expected on an upper GI series (abnormal DJ junction, corkscrew sign), order an urgent surgical referral, initiate resuscitation (IV fluids, NG decompression, broad-spectrum antibiotics), and discuss the Ladd's procedure. Failure to recognize urgency is a critical error.
🔍 Examiner Questions (interactive) – Click to reveal model answers
❓ Q1 (Examiner): “This is a 3-day-old with bilious vomiting. What is the most important and life-threatening condition to exclude? List the differential diagnoses of bilious vomiting in a neonate.”
✅ Candidate's answer:
• Most critical: Midgut volvulus secondary to intestinal malrotation – a surgical emergency.
• Differential diagnoses of bilious vomiting in a neonate:
1️⃣ Malrotation with midgut volvulus (most urgent).
2️⃣ Duodenal atresia/stenosis (double bubble sign).
3️⃣ Jejunoileal atresia.
4️⃣ Meconium ileus (cystic fibrosis).
5️⃣ Hirschsprung disease (enterocolitis).
6️⃣ Necrotizing enterocolitis (NEC).
7️⃣ Incarcerated inguinal hernia.
8️⃣ Sepsis with ileus.
• Rule: Any bilious vomiting in a neonate is malrotation/volvulus until proven otherwise.
• Most critical: Midgut volvulus secondary to intestinal malrotation – a surgical emergency.
• Differential diagnoses of bilious vomiting in a neonate:
1️⃣ Malrotation with midgut volvulus (most urgent).
2️⃣ Duodenal atresia/stenosis (double bubble sign).
3️⃣ Jejunoileal atresia.
4️⃣ Meconium ileus (cystic fibrosis).
5️⃣ Hirschsprung disease (enterocolitis).
6️⃣ Necrotizing enterocolitis (NEC).
7️⃣ Incarcerated inguinal hernia.
8️⃣ Sepsis with ileus.
• Rule: Any bilious vomiting in a neonate is malrotation/volvulus until proven otherwise.
❓ Q2 (Examiner): “What is intestinal malrotation? Explain the normal embryological rotation of the midgut and how malrotation occurs.”
✅ Candidate's answer:
• Normal rotation (weeks 5-12): Midgut herniates into umbilical cord, rotates 270° counterclockwise around the superior mesenteric artery (SMA). The duodenojejunal (DJ) junction fixes to the left of the spine, and the cecum fixes in the right lower quadrant.
• Malrotation: Failure of normal rotation → narrow mesenteric base, DJ junction abnormally positioned (right or midline), cecum in upper abdomen, Ladd's bands crossing the duodenum.
• Consequence: Narrow mesentery predisposes to volvulus (twisting of the midgut around SMA) → intestinal ischemia, necrosis, perforation, and death.
• Normal rotation (weeks 5-12): Midgut herniates into umbilical cord, rotates 270° counterclockwise around the superior mesenteric artery (SMA). The duodenojejunal (DJ) junction fixes to the left of the spine, and the cecum fixes in the right lower quadrant.
• Malrotation: Failure of normal rotation → narrow mesenteric base, DJ junction abnormally positioned (right or midline), cecum in upper abdomen, Ladd's bands crossing the duodenum.
• Consequence: Narrow mesentery predisposes to volvulus (twisting of the midgut around SMA) → intestinal ischemia, necrosis, perforation, and death.
❓ Q3 (Examiner): “Explain the pathophysiology of midgut volvulus in a child with malrotation. Why does bilious vomiting occur?”
✅ Candidate's answer:
• The narrow mesenteric base in malrotation allows the midgut to twist around the SMA (volvulus).
• Twisting causes venous obstruction first → congestion, then arterial compromise → intestinal ischemia, necrosis, perforation.
• Bilious vomiting occurs because the obstruction is proximal to the ampulla of Vater (second part of duodenum), so bile from the liver refluxes into the stomach and is vomited.
• Volvulus is a surgical emergency because irreversible bowel necrosis can occur within hours.
• The narrow mesenteric base in malrotation allows the midgut to twist around the SMA (volvulus).
• Twisting causes venous obstruction first → congestion, then arterial compromise → intestinal ischemia, necrosis, perforation.
• Bilious vomiting occurs because the obstruction is proximal to the ampulla of Vater (second part of duodenum), so bile from the liver refluxes into the stomach and is vomited.
• Volvulus is a surgical emergency because irreversible bowel necrosis can occur within hours.
❓ Q4 (Examiner): “Although no X-ray is provided, what would you expect to see on an upper GI contrast series in a neonate with malrotation and midgut volvulus? Describe the ‘corkscrew sign’ and abnormal DJ junction.”
✅ Candidate's answer:
• Findings in malrotation/volvulus on upper GI:
- The duodenojejunal (DJ) junction is abnormally positioned (to the right of the left pedicle of the vertebral body) – normally left-sided.
- Corkscrew sign (or “twisted” appearance) of the proximal small bowel – pathognomonic for volvulus.
- Double bubble sign (dilated stomach and proximal duodenum) with distal obstruction.
- Beak-like tapering at the site of volvulus.
• Significance: The corkscrew sign confirms midgut volvulus, requiring immediate surgical intervention.
• Note: Upper GI series is the gold standard for diagnosing malrotation. Contrast enema is less sensitive.
• Findings in malrotation/volvulus on upper GI:
- The duodenojejunal (DJ) junction is abnormally positioned (to the right of the left pedicle of the vertebral body) – normally left-sided.
- Corkscrew sign (or “twisted” appearance) of the proximal small bowel – pathognomonic for volvulus.
- Double bubble sign (dilated stomach and proximal duodenum) with distal obstruction.
- Beak-like tapering at the site of volvulus.
• Significance: The corkscrew sign confirms midgut volvulus, requiring immediate surgical intervention.
• Note: Upper GI series is the gold standard for diagnosing malrotation. Contrast enema is less sensitive.
❓ Q5 (Examiner): “This infant is suspected to have malrotation with volvulus. What is your immediate management BEFORE surgical consultation?”
✅ Candidate's answer (emergency protocol):
1️⃣ NPO (nil per os) – stop all oral feeds.
2️⃣ Nasogastric (NG) tube placement to decompress the stomach (prevents further vomiting and aspiration).
3️⃣ Intravenous (IV) access – two large-bore IV lines.
4️⃣ Aggressive IV fluid resuscitation – 20 mL/kg normal saline bolus (repeat as needed) to correct hypovolemia.
5️⃣ Broad-spectrum antibiotics (e.g., ampicillin + gentamicin + metronidazole) to cover translocation from ischemic bowel.
6️⃣ Urgent surgical consultation – pediatric surgeon must be notified immediately.
7️⃣ Correct electrolyte abnormalities and coagulopathy if present.
8️⃣ Continuous monitoring (HR, BP, oxygen saturation, urine output).
9️⃣ Do NOT attempt to reduce volvulus by enema or manipulation.
1️⃣ NPO (nil per os) – stop all oral feeds.
2️⃣ Nasogastric (NG) tube placement to decompress the stomach (prevents further vomiting and aspiration).
3️⃣ Intravenous (IV) access – two large-bore IV lines.
4️⃣ Aggressive IV fluid resuscitation – 20 mL/kg normal saline bolus (repeat as needed) to correct hypovolemia.
5️⃣ Broad-spectrum antibiotics (e.g., ampicillin + gentamicin + metronidazole) to cover translocation from ischemic bowel.
6️⃣ Urgent surgical consultation – pediatric surgeon must be notified immediately.
7️⃣ Correct electrolyte abnormalities and coagulopathy if present.
8️⃣ Continuous monitoring (HR, BP, oxygen saturation, urine output).
9️⃣ Do NOT attempt to reduce volvulus by enema or manipulation.
❓ Q6 (Examiner): “What is the definitive surgical treatment for malrotation with midgut volvulus? Describe the Ladd's procedure.”
✅ Candidate's answer:
• Definitive treatment: Ladd's procedure (laparotomy).
• Steps:
1️⃣ Reduction of volvulus – detorse the twisted bowel (counter-clockwise).
2️⃣ Division of Ladd's bands – congenital adhesive bands crossing the duodenum.
3️⃣ Widening of the mesenteric base – to prevent recurrent volvulus.
4️⃣ Appendectomy – to avoid future diagnostic confusion if the appendix is malpositioned.
5️⃣ Placement of bowel in non-rotated position (small bowel on right, colon on left) – “reverse rotation”.
• If bowel is necrotic: Resection of non-viable bowel ± creation of stoma(s). Massive necrosis may require intestinal transplantation.
• Post-op: NG decompression, TPN until bowel function returns.
• Definitive treatment: Ladd's procedure (laparotomy).
• Steps:
1️⃣ Reduction of volvulus – detorse the twisted bowel (counter-clockwise).
2️⃣ Division of Ladd's bands – congenital adhesive bands crossing the duodenum.
3️⃣ Widening of the mesenteric base – to prevent recurrent volvulus.
4️⃣ Appendectomy – to avoid future diagnostic confusion if the appendix is malpositioned.
5️⃣ Placement of bowel in non-rotated position (small bowel on right, colon on left) – “reverse rotation”.
• If bowel is necrotic: Resection of non-viable bowel ± creation of stoma(s). Massive necrosis may require intestinal transplantation.
• Post-op: NG decompression, TPN until bowel function returns.
❓ Q7 (Examiner): “What is the role of abdominal ultrasound and contrast enema in diagnosing malrotation?”
✅ Candidate's answer:
• Abdominal ultrasound:
- Can demonstrate the “whirlpool sign” (twisted mesenteric vessels around SMA) in volvulus.
- Can show reversal of SMA and SMV (normally SMV is to the right of SMA; in malrotation, SMV may be left or anterior).
- However, ultrasound is operator-dependent and not as reliable as upper GI series.
• Contrast enema:
- May show an abnormally positioned cecum (in upper abdomen or midline), but cecum can be normal in malrotation. Normal cecum does not exclude malrotation.
- Less sensitive than upper GI; should not be used alone to rule out malrotation.
• Gold standard: Upper GI series (demonstrates DJ junction position).
• Abdominal ultrasound:
- Can demonstrate the “whirlpool sign” (twisted mesenteric vessels around SMA) in volvulus.
- Can show reversal of SMA and SMV (normally SMV is to the right of SMA; in malrotation, SMV may be left or anterior).
- However, ultrasound is operator-dependent and not as reliable as upper GI series.
• Contrast enema:
- May show an abnormally positioned cecum (in upper abdomen or midline), but cecum can be normal in malrotation. Normal cecum does not exclude malrotation.
- Less sensitive than upper GI; should not be used alone to rule out malrotation.
• Gold standard: Upper GI series (demonstrates DJ junction position).
❓ Q8 (Examiner): “How urgent is surgery in a neonate with suspected volvulus? What factors affect prognosis?”
✅ Candidate's answer:
• Surgery is URGENT (within hours) – delay leads to bowel necrosis, short gut syndrome, or death.
• Prognostic factors:
- Time from symptom onset to surgery (best if <6-12 hours).
- Presence of ischemia or necrosis at operation.
- Length of bowel resected (massive resection → short bowel syndrome).
- Associated anomalies.
• Outcomes: With timely Ladd's procedure without bowel loss, survival >95%. If necrosis and massive resection, high morbidity (TPN dependence, liver failure, transplantation).
• Surgery is URGENT (within hours) – delay leads to bowel necrosis, short gut syndrome, or death.
• Prognostic factors:
- Time from symptom onset to surgery (best if <6-12 hours).
- Presence of ischemia or necrosis at operation.
- Length of bowel resected (massive resection → short bowel syndrome).
- Associated anomalies.
• Outcomes: With timely Ladd's procedure without bowel loss, survival >95%. If necrosis and massive resection, high morbidity (TPN dependence, liver failure, transplantation).
❓ Q9 (Examiner): “What congenital anomalies are associated with intestinal malrotation?”
✅ Candidate's answer:
• Diaphragmatic hernia (Bochdalek).
• Gastroschisis / Omphalocele.
• Duodenal atresia / stenosis.
• Congenital heart disease.
• Heterotaxy syndromes (asplenia/polysplenia).
• Intestinal atresias.
• Prune-belly syndrome.
• Malrotation can also be isolated (most common).
• Diaphragmatic hernia (Bochdalek).
• Gastroschisis / Omphalocele.
• Duodenal atresia / stenosis.
• Congenital heart disease.
• Heterotaxy syndromes (asplenia/polysplenia).
• Intestinal atresias.
• Prune-belly syndrome.
• Malrotation can also be isolated (most common).
❓ Q10 (Examiner): “What physical examination findings would suggest bowel ischemia or perforation in this infant?”
✅ Candidate's answer:
• Signs of peritonitis:
- Abdominal rigidity / guarding.
- Rebound tenderness (difficult to elicit in neonate).
- Severe, progressive abdominal distension.
- Absent bowel sounds (ileus).
- Erythema or discoloration of abdominal wall.
- Palpable abdominal mass (due to necrotic bowel).
• Systemic signs of sepsis/shock: hypotension, tachycardia, poor perfusion, metabolic acidosis, oliguria, DIC.
• These findings indicate advanced volvulus with necrosis and portend a poor prognosis.
• Signs of peritonitis:
- Abdominal rigidity / guarding.
- Rebound tenderness (difficult to elicit in neonate).
- Severe, progressive abdominal distension.
- Absent bowel sounds (ileus).
- Erythema or discoloration of abdominal wall.
- Palpable abdominal mass (due to necrotic bowel).
• Systemic signs of sepsis/shock: hypotension, tachycardia, poor perfusion, metabolic acidosis, oliguria, DIC.
• These findings indicate advanced volvulus with necrosis and portend a poor prognosis.
❓ Q11 (Examiner): “What is the ‘double bubble’ sign on abdominal X-ray? Which conditions cause it?”
✅ Candidate's answer:
• Double bubble sign: Two air-filled structures (stomach and proximal duodenum) on plain abdominal X-ray, with little or no distal bowel gas.
• Causes:
1️⃣ Duodenal atresia (most common).
2️⃣ Duodenal stenosis/web.
3️⃣ Malrotation with midgut volvulus (can also cause double bubble).
4️⃣ Annular pancreas.
• The double bubble sign indicates proximal intestinal obstruction at or near the duodenum. It requires urgent upper GI series to differentiate atresia from malrotation.
• Double bubble sign: Two air-filled structures (stomach and proximal duodenum) on plain abdominal X-ray, with little or no distal bowel gas.
• Causes:
1️⃣ Duodenal atresia (most common).
2️⃣ Duodenal stenosis/web.
3️⃣ Malrotation with midgut volvulus (can also cause double bubble).
4️⃣ Annular pancreas.
• The double bubble sign indicates proximal intestinal obstruction at or near the duodenum. It requires urgent upper GI series to differentiate atresia from malrotation.
❓ Q12 (Examiner): “What are the long-term complications following Ladd's procedure for malrotation?”
✅ Candidate's answer:
• Recurrent volvulus (rare if Ladd's procedure was adequate).
• Adhesive small bowel obstruction (most common long-term complication).
• Chronic abdominal pain (some children have intermittent symptoms).
• Intestinal malrotation – patients remain at risk for volvulus even after Ladd's (though risk is reduced).
• Short bowel syndrome if massive resection was necessary.
• Failure to thrive (especially if bowel dysmotility).
• Dumping syndrome (rare).
• Lifelong awareness: any recurrence of bilious vomiting in a child with history of malrotation is a volvulus until proven otherwise.
• Recurrent volvulus (rare if Ladd's procedure was adequate).
• Adhesive small bowel obstruction (most common long-term complication).
• Chronic abdominal pain (some children have intermittent symptoms).
• Intestinal malrotation – patients remain at risk for volvulus even after Ladd's (though risk is reduced).
• Short bowel syndrome if massive resection was necessary.
• Failure to thrive (especially if bowel dysmotility).
• Dumping syndrome (rare).
• Lifelong awareness: any recurrence of bilious vomiting in a child with history of malrotation is a volvulus until proven otherwise.
❓ Q13 (Examiner): “How will you counsel the parents who are extremely anxious about their 3-day-old with bilious vomiting?”
✅ Candidate's structured answer:
• “Your baby has a serious condition where the intestine is twisted, called a volvulus. This happens because the bowel did not rotate normally during development. The green vomit is bile, which tells us the blockage is high up in the small intestine.”
• “This is a surgical emergency. We need to operate immediately to untwist the bowel and save it. If we wait too long, the bowel can die.”
• “The surgery is called a Ladd’s procedure. The surgeon will untwist the bowel, remove any bands, and position the bowel to prevent it from twisting again.”
• “We are giving IV fluids, a tube to drain the stomach, and antibiotics. The baby will go to the operating room as soon as possible.”
• “If the bowel is healthy at surgery, the prognosis is excellent. If part of the bowel has died, the surgeon may need to remove it, which can lead to long-term nutritional issues. We will do everything to save as much bowel as possible.”
• “You did the right thing by bringing him in. We will take him to surgery now. We will update you as soon as the operation is over.”
• “Your baby has a serious condition where the intestine is twisted, called a volvulus. This happens because the bowel did not rotate normally during development. The green vomit is bile, which tells us the blockage is high up in the small intestine.”
• “This is a surgical emergency. We need to operate immediately to untwist the bowel and save it. If we wait too long, the bowel can die.”
• “The surgery is called a Ladd’s procedure. The surgeon will untwist the bowel, remove any bands, and position the bowel to prevent it from twisting again.”
• “We are giving IV fluids, a tube to drain the stomach, and antibiotics. The baby will go to the operating room as soon as possible.”
• “If the bowel is healthy at surgery, the prognosis is excellent. If part of the bowel has died, the surgeon may need to remove it, which can lead to long-term nutritional issues. We will do everything to save as much bowel as possible.”
• “You did the right thing by bringing him in. We will take him to surgery now. We will update you as soon as the operation is over.”
❓ Q14 (Examiner): “In this 3-day-old with bilious vomiting, would you order a contrast enema? Why or why not?”
✅ Candidate's answer:
• No, a contrast enema is NOT the first-line study.
• Reason: Contrast enema may show an abnormally positioned cecum, but a normal cecum does NOT exclude malrotation. Up to 20% of malrotation patients have a normal cecum position.
• The gold standard is an upper GI series because it directly visualizes the duodenojejunal (DJ) junction, which is always abnormal in malrotation.
• Contrast enema may be used if upper GI is equivocal or to evaluate for other causes of distal obstruction (e.g., Hirschsprung, meconium plug).
• In this unstable infant, do not delay surgery for any imaging beyond a plain X-ray and upper GI if stable. If highly suspected, direct to OR.
• No, a contrast enema is NOT the first-line study.
• Reason: Contrast enema may show an abnormally positioned cecum, but a normal cecum does NOT exclude malrotation. Up to 20% of malrotation patients have a normal cecum position.
• The gold standard is an upper GI series because it directly visualizes the duodenojejunal (DJ) junction, which is always abnormal in malrotation.
• Contrast enema may be used if upper GI is equivocal or to evaluate for other causes of distal obstruction (e.g., Hirschsprung, meconium plug).
• In this unstable infant, do not delay surgery for any imaging beyond a plain X-ray and upper GI if stable. If highly suspected, direct to OR.
❓ Q15 (Examiner): “If malrotation is found incidentally in an asymptomatic older child or adult, should prophylactic Ladd's procedure be performed?”
✅ Candidate's answer:
• Controversial. Current guidelines favor prophylactic Ladd's procedure in asymptomatic patients because volvulus can occur at any age with potentially catastrophic consequences.
• Risk of volvulus in asymptomatic malrotation is estimated at 10-25% lifetime.
• However, some advocate conservative management with patient/parent education about symptoms of volvulus (bilious vomiting, severe abdominal pain).
• In neonates and infants, most surgeons recommend prophylactic Ladd's procedure due to the high risk of volvulus and difficulty in early recognition in preverbal children.
• In older children/adults, decision is individualized based on anatomy, family preference, and surgical risk.
• Controversial. Current guidelines favor prophylactic Ladd's procedure in asymptomatic patients because volvulus can occur at any age with potentially catastrophic consequences.
• Risk of volvulus in asymptomatic malrotation is estimated at 10-25% lifetime.
• However, some advocate conservative management with patient/parent education about symptoms of volvulus (bilious vomiting, severe abdominal pain).
• In neonates and infants, most surgeons recommend prophylactic Ladd's procedure due to the high risk of volvulus and difficulty in early recognition in preverbal children.
• In older children/adults, decision is individualized based on anatomy, family preference, and surgical risk.
🗣️ Examiner's probing / high-yield points (Surgical Emergency):
• “What is the single most important rule regarding bilious vomiting in a neonate?” → Malrotation with volvulus until proven otherwise – immediate surgical referral.
• “What is the gold standard imaging test?” → Upper GI series (abnormal DJ junction).
• “What is the corkscrew sign?” → Twisted proximal small bowel on upper GI – pathognomonic for volvulus.
• “What is Ladd's procedure?” → Reduction of volvulus, division of Ladd's bands, appendectomy, widening of mesentery.
• “Why is bilious vomiting so significant?” → Obstruction proximal to ampulla of Vater → bile refluxes into stomach.
• “What is the whirlpool sign on ultrasound?” → Twisted mesenteric vessels around SMA in volvulus.
• “What is the single most important rule regarding bilious vomiting in a neonate?” → Malrotation with volvulus until proven otherwise – immediate surgical referral.
• “What is the gold standard imaging test?” → Upper GI series (abnormal DJ junction).
• “What is the corkscrew sign?” → Twisted proximal small bowel on upper GI – pathognomonic for volvulus.
• “What is Ladd's procedure?” → Reduction of volvulus, division of Ladd's bands, appendectomy, widening of mesentery.
• “Why is bilious vomiting so significant?” → Obstruction proximal to ampulla of Vater → bile refluxes into stomach.
• “What is the whirlpool sign on ultrasound?” → Twisted mesenteric vessels around SMA in volvulus.
📘 Bilious Vomiting in the Neonate – Malrotation & Midgut Volvulus (Core Revision)
🔍 Definition
Malrotation = incomplete rotation/fixation of the midgut. Volvulus = twisting of the midgut around SMA → intestinal ischemia. Bilious vomiting = volvulus until proven otherwise.
Malrotation = incomplete rotation/fixation of the midgut. Volvulus = twisting of the midgut around SMA → intestinal ischemia. Bilious vomiting = volvulus until proven otherwise.
📊 Epidemiology
Incidence 1:500 live births. Presents in first month of life in 50-75%. Male predominance. Associated with congenital diaphragmatic hernia, gastroschisis, heterotaxy.
Incidence 1:500 live births. Presents in first month of life in 50-75%. Male predominance. Associated with congenital diaphragmatic hernia, gastroschisis, heterotaxy.
🩺 Clinical Features
Bilious (green) vomiting (90%), abdominal distension, irritability, bloody stools, shock, peritonitis. Late signs: lethargy, hypovolemia, sepsis.
Bilious (green) vomiting (90%), abdominal distension, irritability, bloody stools, shock, peritonitis. Late signs: lethargy, hypovolemia, sepsis.
📋 Diagnosis
Gold standard: Upper GI series (abnormal DJ junction – not to left of left pedicle). “Corkscrew sign” indicates volvulus. Ultrasound: “whirlpool sign”. Plain X-ray may show double bubble.
Gold standard: Upper GI series (abnormal DJ junction – not to left of left pedicle). “Corkscrew sign” indicates volvulus. Ultrasound: “whirlpool sign”. Plain X-ray may show double bubble.
💊 Immediate Management (EMERGENCY)
NPO, NG decompression, IV fluids (20 mL/kg NS bolus), broad-spectrum antibiotics, urgent pediatric surgery consultation. Do NOT delay surgery for imaging if highly suspected.
NPO, NG decompression, IV fluids (20 mL/kg NS bolus), broad-spectrum antibiotics, urgent pediatric surgery consultation. Do NOT delay surgery for imaging if highly suspected.
🔪 Surgical Treatment
Ladd's procedure (laparotomy): reduction of volvulus, division of Ladd's bands, appendectomy, widening of mesenteric base. Resect necrotic bowel if necessary.
Ladd's procedure (laparotomy): reduction of volvulus, division of Ladd's bands, appendectomy, widening of mesenteric base. Resect necrotic bowel if necessary.
⭐ High-yield pearls for TOACS (Bilious Vomiting in Neonate):
• Bilious vomiting is a surgical emergency until proven otherwise.
• Gold standard diagnostic test: Upper GI series (abnormal DJ junction).
• Pathognomonic sign of volvulus on upper GI: Corkscrew sign.
• Definitive surgery: Ladd's procedure.
• Do NOT order a contrast enema as first-line – it can miss malrotation.
• Associations: Diaphragmatic hernia, heterotaxy syndromes, duodenal atresia.
• Prognosis: Excellent if surgery before bowel necrosis; short gut syndrome if massive resection.
• Bilious vomiting is a surgical emergency until proven otherwise.
• Gold standard diagnostic test: Upper GI series (abnormal DJ junction).
• Pathognomonic sign of volvulus on upper GI: Corkscrew sign.
• Definitive surgery: Ladd's procedure.
• Do NOT order a contrast enema as first-line – it can miss malrotation.
• Associations: Diaphragmatic hernia, heterotaxy syndromes, duodenal atresia.
• Prognosis: Excellent if surgery before bowel necrosis; short gut syndrome if massive resection.
🗣️ Candidate's role-play & examiner feedback
💬 To the candidate (role‑play): You will be asked the 15 questions from the Examiner Q&A tab. This is a surgical emergency station. Your response must demonstrate: immediate recognition of bilious vomiting as a red flag for volvulus, urgent surgical referral, correct knowledge of upper GI series findings (corkscrew sign, abnormal DJ junction), knowledge of Ladd's procedure, and appropriate parental counseling. Any delay in recognizing the urgency is a critical error.
📝 Examiner Marking Grid (Bilious Vomiting – Malrotation/Volvulus Station):
- ✅ Recognizes bilious vomiting as a surgical emergency
- ✅ Immediately suspects malrotation with midgut volvulus
- ✅ Orders urgent surgical consultation
- ✅ Orders upper GI series as gold standard diagnostic test
- ✅ Correctly describes expected radiological findings (abnormal DJ junction, corkscrew sign)
- ✅ Initiates emergency management (NPO, NG tube, IV fluids, antibiotics)
- ✅ Describes Ladd's procedure accurately
- ✅ Discusses differential diagnoses of bilious vomiting
- ✅ Counsels parents appropriately (urgency, surgery, prognosis)
- ✅ Recognizes poor prognostic signs (peritonitis, shock, massive resection)
📚 Key references: Nelson Textbook of Pediatrics 22e (Chapter 383 – Malrotation), American Pediatric Surgical Association guidelines, CPSP protocols for neonatal bilious vomiting, ESPGHAN guidelines.