PMC4742478_01
Ultrasonographic findings for the study patient at 32 weeks of gestation. (A) Parasagittal view of the fetus showing a mixed echogenic mass (RK) behind the right atrium (RA) of the fetal heart. The fluid-filled stomach (St) was in a normal position. (B) Subcostal 4-chamber view of the fetal heart (Ht) showing a mesocardia, with rotation of the heart and its apex located in the mid-thorax. A mixed echogenic right kidney was located behind the right side of the fetal heart.
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F1
Initial ultrasonography demonstrated a singleton female fetus with appropriate growth for its gestational age, but the right kidney was absent in the ipsilateral renal fossa, whilst the right lower thorax contained a mass with mixed echogenicity, suggesting an ectopic kidney (Fig. 1A). Fetal echocardiography showed a mesocardia, a rotation of the fetal heart with the apex of the heart located in the mid-thorax with a structurally normal heart, and no signs of cardiac compression (Fig. 1B).
By postnatal computed tomography, through the right
congenital diaphragmatic defect, a posterolateral herniated right kidney (RK) was observed in the neonatal chest and a right renal artery (black arrows) was stretched to feed the intrathoracic kidney.
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F2
The right renal artery was stretched to feed the intrathoracic kidney (Fig. 2).