Firm, non-tender mass in right breast · worsening, nonproductive cough · pleuritic pain · Dx? 
Granulomatous lesions, such as foreign body granuloma, idiopathic granulomatous mastitis (IGM), and sarcoidosis can mimic breast carcinoma.  IGM is associated with elevated prolactin (eg, pregnancy or oral contraceptive use) and is usually subareolar.  Infection, however, is also commonly subareolar.