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The aim of this study was to categorize abnormal mammographic findings in 1000 patients according to Breast Imaging-Reporting and Data System (BI-RADS) and to report most common age of abnormal mammographic findings, average age of incidence of malignancy and determination of suitable age to start the screening process in women. Materials and Methods:1000 patients attending Radiology department for mammographic screening during 2007-2008 were asked to participate in this study. One radiologist evaluated the mammograms and categorized patients based on the BI-RADS. Results: The average age of patients diagnosed with invasive ductal carcinoma and in situ ductal carcinoma was 48±6.51years. The average age of patients in category 5 (that translates into “probably malignant”) was (53±7.87) years. The average age of patients in other categories except for category 0 and category 1 that translates into “negative” was (52.07±7.81) years. There was also a significant relationship between patient’s age and BI-RADS categories according to findings of this study. Conclusion: Based on early incidence of irregular mammographies (52.07 years) and early incidence of malignant findings in such mammographies (48± 6.51 years), it is suggested to implement screening programs in a great scale for patients older than 35 years old. Based on high percentage of patients with increased breast density findings in mammograms (11.6%) and diagnosis of two cases with invasive ductal carcinoma in this group, we recommend sonography of patients with such findings to rule out the presence or absence of malignancy with a higher accuracy for which mammograms lack a diagnostic value.

Evaluation of Abnormal Mammographic Findings in Initial Screening of 1000 Patients during 2008-2009 in Radiology Department of Imam Reza Hospital