[Separation of pygopagous Siamese twins]

Area of Science:

• Medical Case Report
• Surgical Innovation
• Congenital Anomalies

Background:

• Pygopagous conjoined twins present unique surgical challenges.
• Shared anatomical structures, particularly in the sacral region, require meticulous pre-operative planning.
• Associated congenital anomalies can complicate separation procedures.

Purpose of the Study:

• To describe the surgical separation of pygopagous conjoined twins.
• To document the complex anatomical findings, including sacral and urogenital abnormalities.
• To highlight the management of associated lower limb and anorectal malformations.

Main Methods:

• Detailed pre-operative imaging and anatomical assessment.
• Surgical separation technique tailored to the specific conjoined anatomy.
• Post-operative management of associated anomalies.

Main Results:

• Successful separation of pygopagous twins achieved.
• Common sacral canal with two medullary cords and diastematomyelia identified.
• Presence of two dural sacs, unilateral lower limb atrophy, duplicated vulvovaginal ducts, and recto-perineal fistulas in each twin.

Conclusions:

• The successful separation demonstrates the feasibility of complex surgical interventions in pygopagous twins.
• Management of associated spinal, urogenital, and anorectal anomalies is critical for optimal outcomes.
• This case contributes to the understanding of rare congenital malformations in conjoined twins.