Objective: To determine the accuracy and predictive value of the mammographic report according to the BIRADS categories in Songklanagarind University Hospital.
Material and Method: Mammograms of 1000 women who came to Songklanagarind University Hospital from June 1998 to September 1999 were reported and placed in category 1 for negative results, category 2 for benign lesions, category 3 for probably benign lesions, category 4 for suspicious lesions and category 5 for highly suspicious lesions. Accuracy was determined by either histology or by unchanged follow-up mammography within 24 months.
Results: The total accuracy was 97.8%, sensitivity 62.5% and specificity 98.1%.

Keywords: Mammographic, Breast cancer, BIRADS