Faster than normal metabolizing cells such as inflammation and or cancer cells takes more labeled glucose ( used in the PET scan)which result in more uptake seeing in the scan.
Sadly to say, it is not sounds good to me about the mass and the lymph node.
I hope you will try your best to find a excellent Gyn/Oncologist if you are not seeing one right now.
Keep us posted
Peace and Love
jun
Can you maybe call the radiologist to try to get this in layman's terminology?