MRI findings of cancers preoperatively diagnosed as pure DCIS at core needle biopsy

BackgroundUnder-estimation of invasion components occur occasionally at core needle diagnosed ductal carcinoma in situ (DCIS) that may change the prognosis or treatment planning.PurposeTo determine whether enhanced magnetic resonance imaging (MRI) features of biopsy-proven ductal cancers in situ help predict the under-estimation of invasive breast cancers.Material and MethodsAfter a retrospective review of the enhanced MRI features on preoperative proven breast ductal cancers in situ by biopsy, tumor morphology (mass and non-mass), enhancing curve patterns, and non-mass enhanced appearances were compared between pure ductal cancers in situ and invasive ductal cancers (IDCs) after surgery. A statistical analysis was performed, and P values <0.05 were deemed significant.ResultsTwenty-five breast cancers from 24 women were analyzed. Eleven DCIS remained as DCISs, and 14 were upgraded to IDC after surgery. Eight of 14 IDCs (57%) and one of 11 DCISs (9%) presented as mass lesions; otherwise six (43%) IDCs and ...