Table 5.
Orbital involvement in post COVID 19 acute invasive fungal sinusitis on MRI and CT
| Number of cases | Percentage | Imaging features | |
|---|---|---|---|
| Wall including orbital apex | 23 | 74.2 | Frank bone destruction/erosion/rarefaction |
| Proptosis | 11 | 35.4 | Distance from anterior margin of the globe to inter-zygomatic line exceeding 21 mm on axial sections |
| Preseptal cellulitis | 18 | 58 | Diffuse soft tissue stranding/STIR hyperintensity anterior to the orbital septum/Soft tissue lesion extension |
| Orbital fat involvement | 19 | 61.3 | Fat stranding/STIR hyperintensity/Soft tissue lesion extension |
| Extraconal | 19 | 61.3 | |
| Retro-orbital | 15 | 48.4 | |
| Extraocular muscles involvement | 15 | 48.4 | Increased muscle bulk/altered signal intensity/ abnormal enhancement |
| Soft tissue in orbit | 6 | 19.3 | Soft tissue lesion with signal characteristics similar to lesion in nasal cavity/paranasal sinuses |
| Optic nerve sheath complex | 15 | 48.4 | Increased diameter of optic nerve/abnormal enhancement of optic nerve sheath complex |
| Superior ophthalmic vein | 8 | 25.8 | Prominence/ loss of flow void/increased diameter |
Orbital involvement was seen in 25 (80.64%) cases