CT image of left maxilla with a history of allergic rhinitis?
|A.||Ground glass appearance|
Onion Peel Appearance
Ans.B. Double Densities
- Allergic fungal sinusitis is the most common form of fungal sinusitis and is common in warm and humid climates. On imaging, it usually presents as opacification and expansion of multiple paranasal sinuses, unilaterally or bilaterally, with content that is centrally hyperdense on CT scan.
- The majority of sinuses show near-complete opacification. On unenhanced CT, the sinuses are typically opacified by centrally (often serpiginous 7) hyperdense material with a peripheral rim of hypodense mucosa.
- Approximately 40% of patients may have each of the following features:
1.Expansion of an involved sinus.
2.Remodelling and thinning of the bone sinus walls.
3.Erosion of the sinus wall.