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Diagnostic ultrasound ( PDFDrive )

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1236 PART IV Obstetric and Fetal Sonography

A

B

C

F

D

E

FIG. 35.18 Diastematomyelia. (A) Coronal and (B) axial sonograms of the spine demonstrate two hyperechoic foci (arrows) caused by the

bony septum within the spinal canal with intact skin along the fetal back. (C) Anteroposterior radiograph and (D) CT scan demonstrate a bony

septum (arrows) within the central portion of the spinal canal. (E) Diplomyelia and tethered cord. Posterior transaxial sonogram of another fetus

shows cord in the nondependent portion of the spinal canal with luid (F) interposed between the cord and anterior margin of the spinal canal. The

anterior aspect of the cord has a bilobed shape instead of a smooth, circular arc with bilateral central canal echoes (arrows).

A

B

FIG. 35.19 Kyphosis. (A) Sagittal scan of the spine demonstrates a focal kyphosis at the thoracolumbar junction. (B) Three-dimensional image

of the same patient demonstrates a left upper lumbar hemivertebra as the cause of the kyphosis.

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