Mucocoele of the left maxillary antrum (probable)
Nasal discharge; headache; case of recurrent sinusitis.
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MRI through the paranasal sinuses demonstrates complete opacification of the left maxillary antrum. The content is isointense on T1, intermediate signal centrally and high signal peripherally on T2 and demonstrates only peripheral enhancement. The sinus is expanded slightly.
Features are consistent with a mucocoele.