🚰 Chapter 577 · Specific Types of Urinary Tract Obstruction & Their Treatment

Nelson Textbook of Pediatrics 22nd Edition | Detailed coverage: UPJ obstruction (pyeloplasty), posterior urethral valves (valve ablation), primary obstructed megaureter (reimplantation), ureterocele (endoscopic incision/heminephrectomy), ectopic ureter, prune-belly syndrome, and midureteral/retrocaval anomalies.

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📋 30 Clinical Scenarios — Specific Obstructive Lesions & Treatment

📇 High‑Yield Review Cards (Specific Obstructions)

🩺 Clinical Recognition by Obstructive Lesion

Select a presentation for diagnostic clues and lesion-specific management.

📋 Specific Treatments for Each Obstructive Lesion

🔑 Treatment Overview — Nelson Ch 577 (Specific Types)
• UPJ obstruction: Dismembered pyeloplasty (Anderson-Hynes) — 91-98% success. Laparoscopic/robotic options.
• Posterior urethral valves: Transurethral valve ablation. Temporary vesicostomy if urethra too small.
• Primary obstructed megaureter: Observation if stable. Ureteral reimplantation + tapering for deterioration.
• Ureterocele: Endoscopic incision (decompression) then possible heminephrectomy or reimplantation.
• Ectopic ureter: Upper pole heminephrectomy (nonfunctioning) or ureteroureterostomy (functioning).
• Prune-belly syndrome: UTI prophylaxis, orchiopexy <6 months, possible abdominoplasty.

    ⚡ Reflex Prompts — Lesion-Specific Decisions

    📖 Summary: Specific Obstructive Lesions & Their Treatment — Nelson Ch 577