The Added Value of Contrast Enhanced Mammography to Standard Mammography in Assessing the Extent of DCIS

Inclusion Criteria: * Patients with pathohistological diagnosis of ductal in situ carcinoma based on samples obtained by vacuum-assisted breast biopsy (VABB) or ultrasound-guided breast biopsy (CNB) * Presented at the meeting of the multidisciplinary breast team of the Clinical Hospital Center in Rijeka * Patients who underwent surgery at CHC Rijeka and whose pathohistological diagnosis in the final PH report was pure DCIS or microinvasive breast cancer (DCIS with microinvasion) * Patients who agree to participate in the study Exclusion Criteria: * Patients with contraindications for CEM: renal insufficiency (which is ruled out by presenting creatinine and/or eGFR results), iodine allergy, pregnancy/lactation, hyperthyroidism * Patients who have undergone a preoperative breast MRI * Patients who have both DCIS and invasive carcinoma in the preoperative PH report or the final PH report of the surgical material, with the exception of foci with microinvasion (\< 1 mm). * Patients with ipsilateral DCIS recurrence or with previous ipsilateral breast surgery for invasive cancer. * Patients/subjects whose CEMs do not correspond to the diagnostic interpretation for technical reasons are excluded from the study: insufficient positioning, contrast agent extravasation, failed subtraction * Patients under 18 years of age