Comparison of Breast Magnetic Resonance Imaging and Mammography Findings in Detecting Ductal Carcinoma in situ in Preoperative Evaluation

Objectives: Breast cancer is the most common type of cancer in women, imaging methods have an important role in diagnosis and treatment.Ductal carcinoma in situ (DCIS) accounts for approximately 30% of new breast cancer diagnoses.It was aimed to retrospectively compare the sensitivities of breast magnetic resonance imaging (MRI) and mammography (MG) in detecting lesions in DCIS patients and predicting pathological subgroups of the lesion in the preoperative period.Methods: Preoperative MRI and MG examinations of 150 lesions diagnosed with DCIS, with an average age of 59 years, were evaluated retrospectively.In our study, the sensitivities of MRI and MG were evaluated by comparing them with pathological dimensions.In addition, lesions were divided into pathological subgroups and sensitivity comparisons were made between imaging methods.Results: Of the 150 DCIS lesions, 30 (20%) were found solely with MG screening, 15 (10%) were found solely with MRI examination, and the remaining 105 (70%) patients had both MG and MRI detection.While the average size of DCIS was 1.55 cm in 135 mammograms, it was 2.10 cm in 120 MRI examinations.It was statistically significantly lower in MG (p<0.05).Compared to the histopathological size of 105 cases in which lesions were found to be common in both examinations, the accuracy of MRI and MG was 0.64 and 0.58, respectively.Data finds MRI more sensitive in detecting DCIS (p<0.05).Pathological examinations revealed high-grade DCIS in 35 patients (23%) and low-and intermediate-grade DCIS in 115 patients (77%).In the sensitivity comparison between pathological subgroups, no significant statistical difference was found between the two imaging methods (p>0.05). Conclusion:MRI detects a slightly larger size than MG, it has a higher sensitivity in detecting DCIS in younger patient groups.