Out of the 27 patients, 11 patients had mastectomies and 16 underwent breast-conservation surgery (BCS). From the 19 patients who had a postchemotherapy MRI, four had complete therapeutic response, 14 had partial response and one showed disease progression. Of the 27 patients, 14 had circumscribed malignancy with an average size of 39 mm (range = 25 to 60 mm), two had a nodular pattern, four were diffuse, six showed patchy enhancement and one showed septal spread. Of the 14 patients with circumscribed malignancy, 13 had BCS and one had mastectomy. All four patients with diffuse malignancy had mastectomies. Five patients with types 2, 4 and 5 (nine patients in total) MRI patterns had mastectomies.