Hello Mandy

From your post I wasn't sure what type of cancer your mum has in her lung.  Usually, with the more common types of lung cancer the doctors like to start treatment reasonably soon.  But it is possible in her situation that she may have a less common type that it is safe to monitor.  Or she may have enlarged lymph nodes and the doctors are not sure if these are cancer.  Sometimes in this situation these are monitored for a while before being biopsied or treated.

Probably the best thing to do would be to try and get to speak to her doctors again and ask them what type of cancer she has as this might help to explain things quite a bit.

From your post it sounds like she probably has been seen by a multidisciplinary team (MDT).  This is a group of expert doctors and health professionals who look at someones situation from a number of different points of view to help decide how best to look after them.  You might want to check this is the case and if not ask for her to be reviewed by an MDT. 

I am afraid I don't know what the hot spot might be in her cheek. 

I am sorry I can't be any more definite than this and I would suggest that you try to get to talk to her doctor again to help you understand what is going on.

Martin