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J Clin Ultrasound. 2009 Jul-Aug;37(6):350-3. doi: 10.1002/jcu.20583.

Early diagnosis, follow-up, and prenatal treatment of a case of TRAP sequence occurring in a dichorionic triamniotic triplet pregnancy.

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Department of Obstetrics and Gynecology, IRCCS San Raffaele, Milan, Italy.


We are reporting a case of twin reversed arterial perfusion (TRAP) sequence occurring in a dichorionic triamniotic triplet pregnancy with successful percutaneous prenatal treatment and excellent neonatal outcome. TRAP sequence was diagnosed at 11 weeks in a spontaneous dichorionic-triamniotic triplet. Sonographic assessment showed persistent arterial flow and development of hydrops in the acardiac twin. Percutaneous cord interstitial laser coagulation was performed, and the co-twin subsequently developed growth restriction. The 9-month-old twins have a normal developmental course. This report confirms that fetal intervention is indicated in cases of TRAP sequence in which the acardiac twin presents a significant enlargement on follow-up sonographic examinations.

[Indexed for MEDLINE]

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