Severe urethral obstruction diagnosed at 14 weeks' gestation: variability of outcome with and without drainage

Area of Science:

• Perinatology
• Fetal Surgery
• Pediatric Urology

Background:

• Severe fetal posterior urethral obstruction poses risks to fetal development, including lung hypoplasia and renal dysplasia.
• Variability in outcomes necessitates understanding optimal intervention timing and methods.

Observation:

• Three case reports detail outcomes of severe fetal posterior urethral obstruction.
• Two cases demonstrate that early in-utero decompression aids lung development and prevents severe renal dysplasia, but not prune belly syndrome.
• Case 3 highlights the benefits of an endoscopic approach for in-utero urinary tract drainage.

Findings:

• Optimal timing for decompression is before 18 weeks' gestation to maximize lung development and prevent renal dysplasia.
• Continuous drainage until 32-33 weeks' gestation is recommended to mitigate respiratory issues from prematurity.
• Endoscopic in-utero drainage minimizes risks to both mother and fetus.

Implications:

• Early fetal intervention for posterior urethral obstruction can significantly improve neonatal outcomes.
• Endoscopic techniques represent a safer and effective method for fetal urinary tract decompression.
• Further research into selective fetal intervention is warranted to refine management strategies.