Figure 1a. (a) Axial US image of the fetal abdomen shows the fetus in breech presentation with its spine toward the mother's left side (arrow). A left paraspinal mass (arrowhead) appears predominantly solid but also demonstrates several cystic areas. (b) Longitudinal US image of the fetal chest and abdomen demonstrates that the mass is subdiaphragmatic in location but is not clearly differentiated from the surrounding organs.