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SUMMARY

Objective: Our aim was to describe computed tomography image characteristic of paranasal sinus mucoccele.

Method: A retrospective and prospective, axial-descriptive study in paranasal sinus mucoccele patients who were treated at National Otorhinorarynology from December 2016 to July 2019.

Results: 32 patients were enrolled. Mean age was 52.9 (22-83) with M/F=1. Involved sinus distribution including 37.5% frontal-ethmoid, 31.3% frontal, 9.4% ethmoid, 6.3% ethmoid-maxillary, 6.3% sphenoid and 9.4% maxillary sinus. 96.9% tumors were hyperdense or isodense (compared to brain tissue) in pre-contrast CT Scanner. In the postcontrast image: 84.4% of tumors did not marked enhance while another 15.6% had rim enhance which could be explained due to patients clinical acute symtoms of infection. In characteristic, 87.5% tumors had erosion of sinus bone (65.6% lamina papiracea, 25% orbital roof and 25% ethmoidal roof). Regarding to the spread of mucocele: 68.75% tumors had intraorbital extension while 15.6% had intracranial extension. No record of nerve or cavernous sinus invasions.

Conclusion: A sinus computed tomography scan with contrast material was highly valuable in diagnosis of paranasal sinus mucocele and contribute to the planning of surgery.

Key words: paranasal sinus mucocele, computed tomography