<s>[INST] My chest x-ray showed interstitial markings. Since I did not have a prior x-ray to compare it to, the Doctor said it could be acute or chronic and probably had been there awhile. I have worked in a field with aerosol cleaning supplies for a long time. I have a pulmonologist for Asthma. What does this mean and should I be doing anything else besides a repeat chest-x-ray in one year? [/INST] Thanks for your question on Chat Doctor. In my opinion you should get done HRCT (High Resolution CT) thorax. It is the investigation of choice for interstitial pattern on chest x-ray. You are having two positive history.1. Pulmonary symptoms like of asthma.2. Prolonged Occupational exposure to aerosol. Both of these can cause pulmonary damage. So your interstitial marking on chest x-ray can be interstitial lung disease. But HRCT is must for the diagnosis. </s>