"In 2017, doctors removed a blood clot above his left eye at the Mayo Clinic Hospital in Phoenix, AZ. During that procedure, they found a brain tumor known as glioblastoma associated with the clot.
Doctors removed the tumor and said scans show it had been completely removed"
"The standard approach is surgery to carefully remove as much of the tumor as possible without affecting brain function. That is followed by concurrent radiation and oral chemotherapy. McCain underwent brain surgery in July"
https://www.webmd.com/cancer/brain-cancer/news/20180825/us-sen-john-mccain-dies-after-brain-tumor-fight
"In 2017, doctors removed a blood clot above his left eye at the Mayo Clinic Hospital in Phoenix, AZ. During that procedure, they found a brain tumor known as glioblastoma associated with the clot.
Doctors removed the tumor and said scans show it had been completely removed"
https://www.aarp.org/health/brain-health/info-2017/tumor-treatment-mccain-fd.html
"The standard approach is surgery to carefully remove as much of the tumor as possible without affecting brain function. That is followed by concurrent radiation and oral chemotherapy. McCain underwent brain surgery in July"