Patty robins face swelled to the size of a soccar ball.it is because the lymphatic fluid cannot drain through its usual channels and has no where to go so it seeps into the tissue and causes swelling(oedema).This problem can be rectified quite easily with steroids(dexamethasone)One of the less pleasant problems with a tumour that is growing rapidly where yours is,is that it puts pressure on the trachea(windpipe) and so produces a feeling that you may be choking.I am sorry you are not getting satisfactory information,but i am not sure what benefit you think you will get from a scan,it seems what you need more than a scan is to be told how the disease will progress and the implications.

liz