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Fig 5. Patient 6. CT overestimated the size of the defect. Coronal (A) and sagittal (B) MPR images generated from a 0.625-mm axial dataset demonstrate a 5-mm defect in the right ethmoid roof. This patient has had a total ethmoidectomy, and the right middle turbinate has been resected at the skull base. There is mild mucosal thickening below the defect. At endoscopy, the CSF leak localized to this defect but measured only 2 mm.
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