PMC4463774_01
(A) Coronal 3D volume rendered US image showing a narrow bell-shaped thorax with short ribs reaching approximately halfway around the thorax. (B) Sagittal 3D volume rendered US image showing a normal fetal spine. (C) Mid-sagittal grey-scale US image through the fetal face showing the absence of the nasal bone (arrow). (D) 3D volume rendered US image of the fetal face showing a broad flat nasal bridge.
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The fetal thorax was stenotic and bell-shaped with short ribs reaching less than halfway to the thorax (Figure 1A, 2A). The fetus showed the absence of the nasal bone on grey-scale US with a broad and flat nasal bridge on 3D US (Figure 1C, 1D). The fetal spine was normal (Figure 1B).
(A) Coronal US image showing a narrow bell-shaped thorax with hypoplastic lungs. (B) Axial US image through the fetal abdomen showing normal abdominal circumference for gestational age. (C) The right fetal hand showing five digits. (D-F) Fetal long bones, short for gestational age (f - femur, t - tibia, h - humerus, r - radius, u - ulna).
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The fetal thorax was stenotic and bell-shaped with short ribs reaching less than halfway to the thorax (Figure 1A, 2A). The abdominal circumference was normal for gestational age (Figure 2B) with the ratio of thoracic to abdominal circumference of 0.68 which was again 2 SD below mean. Fetal bones showed normal mineralization (Figure 2D-2F). All the limbs showed five digits (Figure 2C).