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Fig. 1A —46-year-old woman referred for evaluation of possible
chordoma. However, unenhanced CT showed findings of arrested pneumatization.
Coronal CT image through sphenoid shows bilateral abnormal marrow trabecular
pattern involving basisphenoid bone in location that often corresponds to
lateral recesses of sphenoid sinus. Lesion has narrow sclerotic margins
(arrows) and occasional internal curvilinear calcifications
(arrowheads).
