Role of Magnetic Resonance Imaging and Magnetic Resonance Spectroscopy in Differentiation Between Benign and Malignant Ovarian Lesions

Abstract

Background: The lesions in ovaries has to be correctly categorized in to benign or malignant type for treatment purpose rather than allowing unnecessary procedures. Histopathological examination usually after surgery is considered the gold standard for diagnosis although non invasive methods are sought. MRS is a novel technique which supplies the metabolic information with the anatomical data from MRI. Thus, MRS may help in preoperative diagnostic if tissue metabolite concentration will be analyzed.

Objective: The objective of this study is to evaluate the role of MR spectroscopy in the characterization and differentiation of cystic ovarian lesions and assess how it enhances the sensitivity and specificity of conventional MRI in distinguishing between benign and malignant lesions.

Methodology: This study was carried out on a sample of gynecological patients with adnexal masses presumed to be ovarian in origin. All patients received both standard MRI as well as Magnetic Resonance Spectroscopy (MRS) as a diagnostic test. MRS was employed to determine the first-order that metabolic profiles of the lesions has to carry certain biomarkers such as elevated choline simulated the malignancy of the cancer. Thus MRS was compared with conventional MRI and sensitivity and specificity was established for the two plans of method applied singly and jointly. Thus, histopathological findings after surgical intervention were the gold standard for the diagnosis.

Results: The study proved that the integration of conventional MRI and MR spectroscopy raised the diagnostic sensitivity in differentiating superficially malignant and benign ovarian masses. MRS had high specificity and positive predictive value in determining malignancy, especially as revealed by the choline peak in malignant tumors. Thus, the enhancement of sensitivity resulting from the combined approach led to a clearer preoperative differentiation and adequate planning of the surgeries themselves.

Conclusion: In vivo H¹ Magnetic Resonance Spectroscopy (MRS) is an effective, noninvasive adjuvant diagnostic technique that improves the assessment of ovarian masses. High specificity and positive predictive value of the described approach to classify the cystic ovarian lesions make it highly effective when used in combination with conventional MRI that in turn helps to enhance the diagnostic yield and guiding the clinical management for such patients. MRI and MRS can be used together as an effective means for initial evaluation, with minimal reliance on surgical intervention but with sufficient specificity to guide the treatment plan.