A well-defined cystic lesion is seen at the left anterior ethmoidal air cells, measuring 12x 12 x 17 mm (AP x W x CC). No definite enhancement or internal calcification. This lesion communicates with the left anterior cranial fossa via the left vertical lamina defect. The defect measures 4.3 mm. No protrusion of brain parenchyma into the aforementioned cystic lesion. No intraorbital extension.
Fluid density is seen at the left frontal and left maxillary sinuses.
Minimal mucosal thickening is seen at the left agger nasi air cells and right maxillary sinus.
Bilateral agger nasi air cells and Onodi cells were noted. No concha bullosa.
No intracranial haemorrhage. No focal brain enhancing parenchymal lesion or abnormal leptomeningeal enhancement. No midline shift. No mass effect. Ventricles are not dilated. Basal cisterns are not effaced.