Paediatrics: Hirschsprung's Disease: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Hirschsprung’s Disease🎧 A clear, high-yield breakdown of this congenital bowel disorder – perfect for exam prep and real-life clinical scenarios.🧠 Key Learning Points📌 Definition• Hirschsprung’s disease is a congenital disorder where nerve (ganglion) cells are absent in segments of the distal colon, causing functional bowel obstruction.📌 Causes & Risk Factors• Failure of neural crest cell migration during fetal development• Genetic factors: several genes and chromosomes implicated (RET gene most common)• Family history• Associated with genetic syndromes, especially Down syndrome (~15% risk)• More common in males (M:F ~4:1)• Potential link to maternal smokingMnemonic: “Hirschsprung: Hereditary, Intestinal, Reduced neural migration, Syndrome-linked, CHildren, Short segment, Predominantly Rectum, Unresponsive to laxatives, Neural crest cell problem, Genetic”📌 Pathophysiology• Absence of parasympathetic ganglion cells (Auerbach & Meissner plexuses)• Affected bowel cannot relax or coordinate peristalsis → functional obstruction• Proximal colon dilates, distal segment remains narrow and non-functional📌 Symptoms• Newborn: – Failure to pass meconium in first 48 hours – Abdominal distension – Bilious vomiting• Older infants/children: – Chronic constipation – Abdominal bloating – Poor weight gain/faltering growth – Episodes of enterocolitis (sudden pain, fever, foul diarrhea)Mnemonic: “No Meconium, Massive belly, Messy burps (vomiting)” for neonates📌 Differential Diagnosis• Intestinal atresia• Meconium ileus (often cystic fibrosis)• Meconium plug syndrome• Functional constipation• Hypothyroidism• Anorectal malformations📌 Diagnosis• Contrast enema: transition zone (narrow distal, dilated proximal colon)• Abdominal X-ray: dilated bowel loops• Anorectal manometry: absent rectoanal inhibitory reflex• Rectal biopsy (gold standard): absence of ganglion cells• Consider genetic testing if syndromic features presentMemory tip: “Biopsy is Best for Hirschsprung’s”📌 Management• Initial: bowel decompression (rectal washouts), NBM, IV fluids• Definitive: surgical resection (“pull-through” procedure) of aganglionic segment and anastomosis to healthy bowel• Temporary stoma (colostomy/ileostomy) in unstable or complicated cases• Aggressive IV antibiotics and bowel irrigation for enterocolitis• Post-op: bowel management program if needed, regular follow-up• Genetics referral if associated syndromes📌 Complications• Hirschsprung-associated enterocolitis (HAEC): can be life-threatening• Persistent constipation or soiling• Incontinence (rare, <1%)• Anastomotic leak or stricture• Bowel obstruction (adhesions)📌 Prognosis• Early diagnosis and surgery result in excellent outcomes for most; 30–50% may experience mild long-term bowel issues. Prognosis is poorer if associated with Down syndrome or if diagnosis/treatment is delayed.📎 More MSRA Resources for Hirschsprung’s Disease📝 Revision Notes: https://www.passthemsra.com/topic/hirschsprungs-disease-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/hirschsprungs-disease-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/hirschsprungs-disease-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/hirschsprungs-disease-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/paediatrics-for-the-msra/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQandANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #HirschsprungsDisease