Hi I Just Wanted To Know If You Can Help

Hi I just wanted to know if you can help me. My father passed away in July and I'm finding it difficult to come to terms with I still don't know what you dad from all I know is that it was lung cancer I was given dad's mri scan results I don't understand them no one explain to me what they meant if I gave you the medical reason could you try explaining to me what it was that my dad from us. He was fit and healthy he had a cough. For a while but his gp treated him and said he had pneumonia