🧬 Chapter 417: Peritoneal Malformations

Nelson Textbook of Pediatrics 22nd Edition — Peritoneal malformations include congenital peritoneal bands (e.g., Ladd bands in malrotation), omental and mesenteric cysts (lymphatic malformations), internal hernias, peritoneal encapsulation, and omental duplication. Clinical features: abdominal pain, distention, palpable mass, intestinal obstruction (partial or complete). Diagnosis: ultrasound, CT scan. Treatment: surgical excision, lysis of bands.

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📋 30 Clinical Scenarios — Peritoneal Malformations

📇 High‑Yield Review Cards (Peritoneal Malformations)

🩺 Clinical Presentations: Peritoneal Malformations

Select a presentation for diagnostic clues and management.

📋 Stepwise Evaluation & Management of Peritoneal Malformations

🔑 Key Principles — Peritoneal Malformations (Nelson Ch.417)
• Congenital peritoneal bands: Can cause bowel obstruction (internal hernia, volvulus). Ladd bands in malrotation → duodenal obstruction.
• Omental & mesenteric cysts: Lymphatic malformations. Present as asymptomatic mass or with pain/distention/obstruction. Risk of torsion, hemorrhage, infection.
• Internal hernias: Bowel protrudes through mesenteric defect → closed-loop obstruction, strangulation.
• Peritoneal encapsulation: Accessory peritoneal sac covering small bowel. Usually asymptomatic, may cause obstruction.
• Treatment: Surgical excision of cysts, lysis of bands, reduction of hernia, repair of defect.

    ⚡ Reflex Prompts — Peritoneal Malformations Decisions

    📖 Peritoneal Malformations — Core Summary (Nelson Ch.417)