What Speicalitiy is the Consultant? There are many types of brain tumour that affect people. Unless there has been a probe and sample taken, I would expect it would be difficult to ascertain if this type would be susceptible to hormonal changes which are going to happen, regardless of HRT or not.
Once the dust has settled a bit, I would comprise a list of queries now that you have the diagnosis and make an appt. to see him again. My first query would be : is a tumour such as mine likely to be influenced by the drop of oestrogen during The Change, by this particular HRT combination (what ever you are on) - after all this time of Life is natural as is the tumour. Is he able to show statistics regarding any growth and if so, by any particular % - i.e. fast, slow .... I would like to have details of how hormones over-all affect this particular tumour in both men and women.
Also was the tumour likely to have been the cause of the accident or was it found incidentally?