PMC4900102_01
42-year-old woman with idiopathic granulomatous mastitis. (A) demonstrates a 0.8cm solid oval mass (arrow) in the 9 o'clock location. (B) demonstrates a 1.2cm solid oval mass (arrow) in the 10 o'clock location. Both of these lesions were proven by biopsy to be benign breast tissue with sclerosing adenosis and stromal fibrosis. (C) demonstrates a 1.5cm lobulated oval solid mass in the 6-to-7 o'clock subareolar region (arrow), the area of the palpable abnormality. Biopsy showed benign breast tissue with marked inflammation, multinucleated giant cell reaction, and abscess formation.
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Sonographic evaluation revealed oval, well-defined, benign-appearing isoechoic-hypoechoic masses suggestive of fibroadenomas, at 6, 9, and 10 o'clock (Fig. 1).
42-year-old woman with idiopathic granulomatous mastitis. Dime-sized areas of induration and erythema at the sites of prior biopsies (arrows). Pus drainage was reported.
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These findings began a few days following the core biopsies (Fig. 2).
42-year-old woman with idiopathic granulomatous mastitis. Antiradial right breast subareolar ultrasound demonstrates a 5cm complex fluid collection (arrow) at the site of the previous biopsy. Initially this was thought to be a postbiopsy abscess.
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Ultrasound revealed a 5cm complex fluid collection with sinus tracts centered between the 6 o'clock and the 9 o'clock positions (Fig. 3).