Hi
Staging is done by the size of the tumour the invasion of the lymph nodes and the spread elsewhere.If you have had a needle biopsy done then pathology will say if the tumour is primary or secondary and what type,a cat scan may identify the size so staging should already be possible .For more information about staging,go to the search engine at the bottom of the ocf log in page and type staging .The information is detailed and very easy to understand.