Welcome, and good work being persistent. I had Tonsil, BOT cancer with lymph node metastases that was confirmed by CT, FNAB, PET/CT, and direct biopsy.

1. I doubt it, unless they do a scan, see something suspicious or FNAB confirms. Also depends on tumor size, location of tumor like floor of mouth, which may spread differently than lateral tongue.

2. Maybe. I would want one. Chest x-yay too. Did your brother smoke.

3. Yes. They still can do a test if the tissue from biopsy was frozen, saved. Most HPV, 90 percent, are in the oropharynx. If HPV, they should look at the tonsil, BOT by endoscopy/triple scope.

Hope this helps.