Objective: To evaluate the diagnostic performance of Mammography in the diagnosis of benign and malignant breast mass.

Method: This Cross-sectional type of study was carried out in the Radiology & Imaging department of Sir Salimullah MedicalCollege and Mitford Hospital, Dhaka, during July 2013 to June 2015, to determine the value of mammography in evaluation ofbreast mass, and also to determine the sensitivity, specificity, accuracy, PPV and NPV of mammography in the diagnosis ofbenign and malignant breast mass in comparison to the histopathological findings. For this purpose clinically suspected ashaving breast mass, referred in the above mentioned hospitals and enrolled for surgical management were included in thisstudy. Mammography were done in all these patients and they were followed up from the admission upto the post operativetissue diagnosis of breast mass in respective pathology departments for histopathological correlation

Results: Almost one third (31.6%) patients were age belonged to 46-50 years and the mean age was found 47.8±6.4 years. A totalof 41 patients had mass only among them, 3 (7.3%) were malignant and 38 (92.7%) were benign patients. Six patients were masswith spiculation, among them all (100.0%) were malignant patients. Five patients were mass with macro calcification; amongthem all (100.0%) were benign patients. Two patients were mass with micro calcification, among them all (100.0%) weremalignant patients. Three patients were mass with spiculation, micro calcification and enlarged axillary lymph node; amongthem all (100.0%) were malignant patients. Out of 57 patients, on histopathological diagnosis 29 (50.9%) were firbroadenoma,6 (10.5%) were fibrocystic change, 4 (7.0%) were cyst, 4 (7.0%) were abscess and 1(1.8%) were galactocele. They were benignlesion of breast. Histopathological diagnosis of invasive ductal carcinoma, invasive lobular carcinoma and medullary carcinomawere 8 (14. %), 4 (7.00%) and 1 (1.8%) respectively. Mammography malignant was found 14 cases out of which 10 (76.9%)malignant and 4 (9.1%) benign evaluated by histopathology. Mammography benign was found 43 cases out of which 3 (23.1%)malignant and 40 (90.9%) benign evaluated by histopathology. The sensitivity was 76.9%, specificity 90.9%, accuracy 87.7%,positive predictive values 71.4% and negative predictive values 93.0% in mammography for identification of breast mass.