“…The usefulness of contrastenhanced CT over precontrast CT has been questioned [41]. Inflammation, sinonasal neoplasia, ethmoid haematomas, parapharyngeal aneurysms and abscess capsules typically enhance (Fig 2) [39][40][41][45][46][47][48]; although cholesterinic granulomata may [42,43], or may not [41] contrast-enhance. Inflammation, sinonasal neoplasia, ethmoid haematomas, parapharyngeal aneurysms and abscess capsules typically enhance (Fig 2) [39][40][41][45][46][47][48]; although cholesterinic granulomata may [42,43], or may not [41] contrast-enhance.…”