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Low-flow CSF leak seen only on decubitus myelography. Axial prone CTM image (A) shows no CSF leak at the T10–11 level. The patient was turned into the left lateral decubitus position and re-scanned, again with the scan showing no leak (not shown). The patient was then turned to the right lateral decubitus position. An axial CTM image from the decubitus myelogram (B) obtained 6 minutes later shows a low-flow CSF leak not seen on prone myelogram (arrow).
