Sarcoidosis developing during therapy for breast cancer

Two women with breast carcinoma developed bilateral hilar adenopathy, with pulmonary infiltrate in one, during treatment for breast carcinoma. There was strong suspicion of metastatic disease from breast carcinoma. However, biopsy of a mediastinal node in first patient and transbronchial specimen biopsy in the second patient proved the diagnosis to be sarcoidosis. In one patient improvement was noted without therapy, and in the other improvement was noted with steroid treatment.