Epispadias is categorized by three degrees of severity. Which of the following represents the most severe form?

• A. Classic bladder exstrophy
• B. Cloacal exstrophy
• C. Omphalocele
• D. Gastroschisis

Answer: (B)

Epispadias sits on a spectrum of malformations caused by incomplete closure of the front of the body wall. The most severe form in this spectrum is cloacal exstrophy, where the bladder and portions of the intestine are exposed and the urinary, genital, and intestinal tracts meet in a persistent cloaca. This represents the greatest disruption of midline closure and organ involvement, necessitating complex reconstruction and often additional anomalies. Classic bladder exstrophy is serious but lacks the extensive cloacal malformation seen in cloacal exstrophy, and omphalocele and gastroschisis are separate abdominal wall defects not part of this epispadias-exstrophy continuum.