Fig. 1.-A, Longitudinal sonogram through fetal chest and abdomen. Fetus lies on its right side. Cystic adenomatoid malformation (c) fills entire left chest and shifts the heart (h) into right chest. Tumor is more echogenic than normal liver (I). Scalp edema (e). Polyhydramnios. B, Transverse sonogram of fetus through mass (c). Heart (arrow) shifted into right chest. L = left; A = right.
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Johnson et al. (1984) studied this question.
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