Science and Education Publishing American Journal of Medical Sciences and Medicine 2327-6657 1 5 2013 11 13 Misdiagnosis IGM with Breast Abscess: A Case Report 83 85 EN Jalal Vahedian Ali Zare Mehrjardi Ehsan Saraee Amir Saraee General Surgery Department, Firoozgar Hospital, Tehran University of Medical Science, Tehran, Iran AJMSM2013152 10.12691/ajmsm-1-5-2 2012 12 28 2013 10 21 2013 11 13 Idiopathic granulomatous mastitis (IGM) is an uncommon chronic inflammatory lesion of the breast, which is sometimes misdiagnosed as breast cancer or breast abscess. We present a 30-year old woman who came to our clinic with a recurrent and multiple abscesses in her left breast. After twice incision and drainage of the abscess, and after pathologic diagnosis of IGM, she was treated with prednisolone and responded dramatically.