الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Postsurgical changes can resemble malignant lesions in some patients, they also can mask signs of malignancy in others. It is important for radiologists to detect and appropriately recognize these alternations to diagnose recurrent tumor as early as possible using different modalities such as US and MRI and confirming the diagnosis by histopathological correlation. It also is important to avoid over diagnosis in these patients so as not to lead to unnecessary biopsies of irradiated tissues where healing processes might be disturbed.[3] Comparing the US criteria between both positive and negative IDC groups, our study revealed that lesion vascularity can be a reliable factor to suspect if the suspicious postoperative lesion can be recurrent/residual lesion versus post therapy changes or fibrosis. According to the lesion type by US, finding of a mass lesion had statistically significant difference between both groups, So, from the US finding we can detect that finding of a mass lesion with mild/moderate vascularity can predict that the postoperative finding is most probably recurrent/residual mass than fat necrosis or sclerosis. Combining this with US features of detected mass, irregular mass shape and detected vascularity have sensitivity of 70.7%, 70.3%, and 34.1%, respectively and these combinations have specificity of 81.2%, 66.7%, and 100%, respectively.