Do you know if your mom had a problem with her lungs before? I think, panel physicians if i may say are more strict with medical results for PR. I have the same issue with my mom. She had a scar from 1976 lung problem and they asked her to do 3- day sputum test. When she had her medical for tourist visa in 2009 there was no issue, no repeat xray, nothing. But now, she has to do the 3 day sputum tests. Not only once but thrice. They just wanna make sure that everything is clear. So let's just hope, everything will be finished soon so they can forward the results sooner.