Raidodense Lesions in Chronic Paranasal Sinusitis

Chung, Seung Kyu; Kim, Hyo Yeol; Dhong, Hun Jong

Abstract

BACKGROUND AND OBJECTIVE
Intrasinus ossification is rarely observed in the imaging study of paranasal sinus. The pathologic findings and the treatment principles of the radiodense lesions which are located in the inflammatory lesion of the paranasal sinuses are not clarified enough. In this study, we try to describe the CT findings and histopathology of intrasinus calcification in chronic paranasal sinusitis.
MATERIALS AND METHODS
Ten patients who underwent sinus surgery for the abnormal bony calcification were included in this study. The shape and location of intrasinus calcification were evaluated in the CT. The pathologic specimens were reviewed.
RESULTS
Most of the patients had high Hounsfield unit at CT imaging. Osteomas were found in 7 patients, fungal sinusitis in 2 patients, and the new bone formation in a patient. Osteoma and the new bone formation were located at the periphery of the sinus cavities. The calcifications in fungal sinusitis were found at the central of the sinuses. Infiltration of the inflammatory cells were found in the matrix of fungal sinusitis, but not in others.
CONCLUSION
Intrasinus radiodense lesions are different in the location and shape according to the pathology. The findings in the CT imaging of intrasinus calcification are helpful for the differentiation of these lesions.