Thank you so much!It was his own application for PR canada. His xrays showed a dot on his lever as he was a chain smoker. He went tbrough sputum test and advised to redo his x rays after 3 months. Sputum was although found ok. But reason of redoing xrays after 3 months was to check that if that dot was increasing or remain same sized. Finally he passed his medical because the dot was constant sized. .i