Table 1 Differentials based on T1 hyperintensity of sphenoid sinus [7,8,9]
From: Sphenoid sinus aspergilloma clinically mimicking as malignancy—a case report
Sphenoid sinus aspergilloma in our case | Expansile, T1 hyperintense, T2 hypointense, No restriction on DWI, no enhancement on post-contrast study, hyperdense on CT |
|---|---|
Mucocele | Expansile, T1 hyper/hypointense and T2 hyperintense, no post-contrast enhancement. |
Melanoma | T1 hyperintense, T2 hyperintense, show enhancement in post-contrast study, generally arise in nasal cavity. |
Dermoid | T1 hyperintense, STIR hypointense, fat density on CT |
Epidermoid cyst | Usually follow CSF signal but may be T1 hyperintense, show restriction on DWI. |
Craniopharangioma and Rathke’s cleft cyst | Usually T1 hypointense and T2 hyperintense. Can be T1 hyperintense, however, the epicenter of the lesion is usually sellar/suprasellar while in our case, it is in sphenoid sinus. |
Inverted papilloma | Usually arise in nasal cavity, involve sinuses secondarily, T2 hyperintense |