Unilateral Opacification of Paranasal Sinus CT Scans

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Abstract
Objectives: The aim of study was to describe the histopathology in patients with unilateral sinus opacification and to identify variables that may predict neoplastic pathology.Study Design: A retrospective review of paranasal sinus CT scans performed between 2000 and 2003 was conducted to identify patients with unilateral sinus opacification.Results: Twenty‐eight of 1118 CT scans showed unilateral sinus opacification. Twelve patients had neoplastic disease, 13 had inflammatory disease. Nasal discharge was more common in inflammatory than neoplastic disease (P = 0.009). A polyp or mass lesion was more common on nasendoscopy in neoplastic than inflammatory disease (P = 0.01). Bony erosion was only identified in malignant disease.Conclusion: A wide variety of pathologies present with unilateral sinus opacification on CT scanning. In our series, neoplastic disease was more associated with a visible polyp or mass lesion and less with nasal discharge. Bony erosion on CT scan was only seen in malignant disease. Histologic confirmation remains obligatory for diagnosis.

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