Abstract
ObjectiveTo assess role of Diffusion weighted imaging (DWI) in addition to dynamic contrast-enhanced magnetic resonance mammography (DCE-MRM) in detection of breast cancer recurrence after surgery. Patients and methodsSixty female patients who underwent breast surgery were included in this prospective study. Patients were examined by sonomammography followed by DCE-MRI to exclude recurrence. DWI was performed using b values of 0, 50, and 850s/mm2. Patients with suspected recurrence were subjected to histopathological confirmation. ResultsTwenty seven patients had pathologically proven recurrence and thirty three patients showed spectrum of post operative changes. DCE-MRI was superior to DWI with 2 false positive (FP) cases and no false negative (FN) cases, while DWI showed 3 (FN) cases and 4 (FP) cases. DCE-MRI & DWI showed sensitivity (100%, 88.9%), specificity (93.9%, 87.9%), positive predictive value (PPV) (93.1%, 88.9%), negative predictive value (NPV) (100%, 90.6%) & accuracy (96.7%, 88.3%) respectively. ConclusionOur study showed better diagnostic performance for DCE-MRI compared to DWI in post operative breast assessment. However, DWI can provide an alternative diagnostic tool to contrast administration “if interpreted in association with conventional MR sequences” thus can be used when contrast media is contraindicated.
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