PMC2742653_01
Fetal ultrasound of twin B illustrating anterior wall defect (arrow).
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fig1
A. A 2-3 cm diameter lower abdominal mass and extracorporeal liver with an entering vessel suspicious for omphalocele was seen on twin B (Figure 1). 
Closeup of bladder plate indicating location of ureteral orifices (solid arrows) and phallus with epispadias (dashed arrow).
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fig2
The anterior abdominal wall mass was infraumbilical with a large, everted mucosalized surface and identifiable ureteral orificies consistent with bladder exstrophy (Figure 2). 
Ultrasound of pelvis of twin B at 2-month followup showing intact abdominal wall with full bladder (arrow).
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fig3
Renal bladder ultrasound showed growing kidneys and a filled bladder (Figure 3).