Hope it continues to shrink. You may have Trigeminal Neuralgia which is one of the Largest cranial nerves in the cavernous sinus area. I had Gamma Knife twice. My NS at UCSF did not recommend surgery. I’m feeling better but have developed inflammation In the dura that could be Tolasa Hunt Syndrome. They are currently diagnosing it as Idiopathic Pachymeningitis. Prednisone taper down worked but came back as soon as I stopped the prednisone so I was given Rituximab infusions every 12-18 months. I just had my third set of Rituximab infusions this month and feeling better now.