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Figure 1: Preoperative images. (1a) T1 MRI-weighted axial image reveal hypointense to isointense lesion with compression on falx. (1b) T2 MRI-weighted sagittal image showing lesions appearance as heterogeneous. (1c–1e) Contrast T1 axial, coronal, and sagittal, respectively, lesion shows intense contrast enhancement with nonenhancing areas. 1f: SWI MRI showed blooming in the lesion suggestive of haemorrhage. (1g-1h) CT PNS coronal and CT PNS coronal bone window shows well-defined isodense mass lesion in left ethmoid sinus extending to nasal cavity causing erosion and destruction of medial orbital wall and cribriform plate

Figure 1: Preoperative images. (1a) T1 MRI-weighted axial image reveal hypointense to isointense lesion with compression on falx. (1b) T2 MRI-weighted sagittal image showing lesions appearance as heterogeneous. (1c–1e) Contrast T1 axial, coronal, and sagittal, respectively, lesion shows intense contrast enhancement with nonenhancing areas. 1f: SWI MRI showed blooming in the lesion suggestive of haemorrhage. (1g-1h) CT PNS coronal and CT PNS coronal bone window shows well-defined isodense mass lesion in left ethmoid sinus extending to nasal cavity causing erosion and destruction of medial orbital wall and cribriform plate