In 2001 I started having seizures regularly (Grand Mail)

sometimes 4 per day, I learned I had a cyst in the right temporal lobe.

so I had surgery in 2006 to remove, at this stage was confirmed as grade 2 astrocytoma. 6 months later, post op mri showed tumour had returned, a further biopsy followed by 6 weeks radiotherapy confirmed Grade 3 astrocytoma.

seizures increased for the following year. My consultant confirmed in no uncertain terms the tumour would return in the form of glioma. 
it's now 2023 I'm now 47 & I wonder why am I still here?