Evaluation of the Accuracy of CT Scan in Characterizing Orbital Masses

Abstract

Background: Orbital mass lesions are a very common feature these days. CT(Computerized tomography) scan is helpful in etiopathological diagnosis of orbital mass lesions. By knowing precisely where a lesion is located, the proper surgical approach can be selected to minimize morbidity. Aim: To determine sensitivity, specificity and accuracy of CT scan in characterizing orbital masses Methods: 100 Patients referred to Radiology department with clinical diagnosis of orbital mass lesions were evaluated prospectively with CT scan. CT scan of the orbit was performed with 3mm thick axial slices. After giving intravenous contrast, axial slices were repeated and direct coronal 5mm slices were also taken. Based on CT appearances of masses, a provisional diagnosis was given. Results: After completion of study, the CT provided overall sensitivity and specificity of 73.3% and 85.5% respectively. Overall accuracy was 85.3%. Conclusion: Results conclude that CT is very much helpful in diagnosing and staging orbital masses. It is non – invasive and helps in planning for surgical approach and in reducing morbidity.