Hello. Have you been scheduled for an MRI or angiogram to follow up on this CT finding?
It would be important, given your continued symptoms, to rule out a subtotal obliteration of your AVM that was not appreciated after gamma knife surgery and now has enlarged again or recanulated.
Similarly, a rare occurrence following gamma surgery for AVM's is the development of an expansive cyst at or adjacent to the obliterated AVM
These can occur 5 to 10 years following treatment and occasionally are symptomatic due to mass effect, requiring retreatment.
An MRI or MRA should reveal the presence of such complications. In the meantime, if you are feeling ill and your headaches are severe, you should be evaluated by a doctor and possibly have a lumbar puncture, especially if the MRI is not readily available or is indeterminate.
Please let me know if you have any follow up questions.
Hiya Dr Bob, im sorry I haven't replied earlier but ive been ill, not sure if its related. I have just received a call from the consultant this evening, at 9pm, to say that hes been talking to my neurosurgeon and they have decided to try and fit me in early Friday morning to perform an angiogram and an mri. He will let me know on friday lunch time the results of these tests. I will update you when I get the results, thank you for your help.