A rare presentation of interstitial lung disease in a follow-up patient with breast carcinoma

Breast cancer is the most common malignancy in women. The incidence is increasing in developing countries. Adjuvant radiation reduces ipsilateral breast tumor recurrence and, in turn, improves overall survival in both early and locally advanced breast cancer patients who have undergone breast conservation surgery and mastectomy, respectively. The lung is one of the dose-limiting organs in thoracic radiation. The incidence of radiation pneumonitis is rare, ranging from 5% to 15%. The incidence has further decreased with newer techniques of radiation treatment delivery. Here, we present a case of right breast carcinoma with an atypical presentation of interstitial lung disease 5 years after treatment.