Breast cancer with right mastectomy, chemo and radiation. After radiation a scan showed a cloudiness in right lung. I was told it was from radiation and would be monitored and may go away. 5 years later I am told that I have RILI radiation induced lung disease, in other words the radiation that caused 2nd degree burns on my skin also damaged the lung tissue. I am asymptomatic, no coughing or breathing problems but my lung function has reduced. I exercise, cardio and strength training weekly. Walk quickly to slow jog regularly. I see a pulmonologist for surveillance. A lot is unknown about this. HTH.