I am currently awaiting a biopsy to confirm lymphoma due to an enlarged lymph node in my left leg, that showed active involvement on a pet scan. I also had involvement on the tongue, throat and esophagus on the scan. I also have severe pressure in the head, swollen lymph nodes and what appears to be fluid in my head- so bad that the pain makes it impossible to lay my head on a pillow, could this also be malignancy in my brain and throat. And what would cause inflamed nodes throughout my body, neck, head, armpits groin and etc, and the fluid in my skull.