<s>[INST] my father is 65 and hasnt somked in 27yrs but has lost a lot of weight in the past year. he has been short of breath recently and went for a chest x-ray. The doctor said he had smokers lungs and his x-ray showed both lungs to be cloudy. the doctor said he couldnt see any tumors so wht does this mean? [/INST] Hi thanks for contacting Chat Doctor... Your father having interstitial fibrosis like condition that is restrictive lung disease .... It could be induced by smoking or secondary to viral interstitial pneumonia ... Spirometry done for grading severity of restrictive disease and accordingly management. You might need bronchodilator Chat Doctor. ... Avoid exposure to dust, pollution or smoking limited .... If needed and x-ray seems suspicious biopsy can be taken for histopathological examination.... Hope your concern solved . Consult pulmonologist for this ... Take care ... </s>