Isolated eosinophilic infiltration of the breast

We report the eighth case of eosinophilic mastitis and the first one without an association with peripheral eosinophilia or systemic involvement. A 51-year-old diabetic presented with a painful right breast lump. The mammogram, ultrasound, and magnetic resonance imaging suggested a diagnosis of periductal mastitis, however, a sinister etiology of breast carcinoma could not be ruled out. Diagnosis was made by vacuum assisted biopsy which revealed features of eosinophilic mastitis.