I have just red a post about someone having a nodule in their thyroid and asking for info. That makes me think I can find here some info and advose for my case too which I would really appreciate. I am not English natu e speaker so I am bit struggling with technical words. 

I was diagnosed with a tumour in my thyroid more than a year ago. Results showed it was a Th4 and now, last results showed it is is categorised as THY3F. I am bit confused whether both results follow the same scale as they are named differently. Does this mean      The  tumour has gonne form level 3 to 4? The results also sayno true papillary groups are seen . What does it mean?

Thanks in advanced and support