EVALUATION OF MAGNETIC RESONANCE IMAGING INCHARACTERISATION OF OVARIAN NEOPLASMS

Objective: To evaluate MRI\\\'s effectiveness in detecting malignant ovarian neoplasms and differentiating them from benign lesions, using histopathological findings as the gold standard. Methodology: A descriptive study with diagnostic test evaluation was conducted on 50 female patients referred for MRI evaluation of ovarian lesions at Govt. T. D. Medical College, Alappuzha. MRI findings were compared with histopathology. Ovarian neoplasms were categorized based on morphology. Various criteria for malignancy detection were assessed. Results: Using MRI, positivity for any 5 out of 6 general criteria showed: Sensitivity: 95%, Specificity: 83.33%, Positive Predictive Value: 79.17%, Negative Predictive Value: 96.15%, Accuracy: 88% For 6 out of 6 criteria, specificity and positive predictive value increased to 100%, with slight sensitivity reduction. Adding ancillary criteria had minimal impact. Subcategories showed: Cystic/multilocular cystic lesions: Sensitivity: 50%, Specificity: 91.67%, Accuracy: 85.71% Solid-cystic/predominantly solid lesions: Sensitivity: 88%, Specificity: 100%, Accuracy: 92.86% T1 hyperintense lesions: Sensitivity, Specificity, and Accuracy: 100% Conclusion: MRI combined criteria are highly sensitive and specific for detecting malignancy, especially in T1 hyperintense lesions, but less so in cystic ovarian neoplasms. Diffusion restriction and necrosis are strong individual predictors.