Hello - I don't really know how to start this post!

In December last year I was diagnosed with kidney cancer. In January I had my left kidney removed. Five months later I am still struggling with the aftermath of having major surgery and the nerve damage it has caused. I don't think I've healed very well. They are monitoring me every 3 months. I have since been made redundant due to Coronavirus. Then on Wednesday 11th June, one day after my father's 82nd birthday, he was asked to attend the chest clinic at the local hospital. He had seen his GP about a bowel related matter and had been for a CT scan. So to be asked to go to the chest clinic seemed strange. Apparently they have found that his right lung has thickening and the doctor believes it is Mesothelioma lung cancer. They have given him two choices 1. Monitoring the situation OR 2. To have a lung biopsy. Today he has informed the hospital he would like to go ahead with the biopsy. My sister and I have discussed it with him but ultimately the decision was his. He has barely any symptoms and this all seems so unreal and unbelievable. He currently doesn't take a pill and is in very good health for a man his age. I've no idea what's going to happen, they have said that if it is cancer, it would be incurable and that chemotherapy may not be an option at his age. So all the biopsy will do is confirm if it is malignant or benign and I am worried that the biopsy is a bad idea for him. Please can anyone give me your thoughts. Thank you and sorry it's a long post.