Hello to all on this forum!

I come from the third world developing country. I have a lump on my gum, approx. 8 mm. with elevated hard centre, whitish in colour, not painful. It persists for more than a year now. It is not growing, but the gums nearby and around are changing in colour and structure, with roots of my teeth becoming visible. All doctors whom I've seen refuse to make biopsy. I did panoramic x-ray of the jaws and PET/CT scan, nothing came up. At the same time I've got persistent otitis that comes and goes for the past year. Very worried.

They did try FNA but I think they missed it only fibrocyte and eritrocyte. came out. Is there any other non invasive method to check this?