I am writing in regards to my dad. He has been having a persistent cough for the past year and a half. It gets better with antibiotics and worse with cold . He has had fluid drained from his lungs after which he got better but seems like the cough is back again. He has had multiple CT scans. Yesterday, we went to a respirologist and the dr said that since he had smoked about 13 years ago and has not crossed the 14-year mark, he is at risk of cancer. He said that there is shadowing of his left lung. His sputum is clear to white and he has chest pain when he breathes really hard. I am so freaked out ever since the doc expressed the possibility of cancer. His bronchoscopy appointment is not until 3 weeks. Is there anything else it could be? I am really worried .