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Updated: Jul 28, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
Published on: September 5, 2011
Acardia syndrome coexisting with gastroschisis in the co-twin
O A Habbal1, R K Kenue, P Venugopalan
1Departments of aHuman and Clinical Anatomy Child Health, Sultan Qaboos University, Muscat, Sultanate of Oman.
Abstract:
Acardia syndrome is a rare complication affecting monozygotic twins, wherein one twin fails to develop brain and thoracic structures, while the co-twin most often develops normally. In this report we present an acardiac anencephalic monozygotic twin with an omphalocoele and a co-twin with severe intrauterine growth retardation and gastroschisis. The presence of gastroschisis in the co-twin of an acardiac foetus is rare. The embryologic basis of the twin reversed arterial perfusion (TRAP) sequence is outlined and the observed anomalies in the co-twin traced to a similar pathophysiology.
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