@tomha I was diagnosed with MAI and cavitary lesions last year and went through the antibiotic regimen which eradicated the MAI and I am now off meds. The cavitary lesions are still there but we just watch them with CT scans. If they cause no trouble they can stay as far as I'm concerned. I'm not interested in surgery at this juncture since I feel well. So, anyway, I am glad that you caught that before you had the lobectomy and am here to tell you that although the antibiotics did affect me, they were not debilitating. I was on azithromycin, clofazimine, ethambutol, rifabutin and amikacin inhaled and IV (not at the same time). Are you still working? I took early retirement (I'm 63) when diagnosed since I really was not feeling well.