Both United States Senator Edward “Ted” Kennedy and Delaware attorney general Beau Biden, the son of former Vice President Joe Biden, died of glioblastoma.

Interesting, that.

Also, OP...

I worked in a Neurosurgical Intensive care unit for many years. This is not what you look like after brain surgery for a glioblastoma. They shave your head and take a section of your skull plate out. You end up with a zipper head with dozens of staples

The small cut above his eye wasn't from the glioblastoma surgery. It was from the blood clot surgery.

One day after revealing his diagnosis, McCain returned to Twitter and promised that he’d be back on the Senate floor. McCain’s diagnosis came just a few days after he had surgery — a minimally invasive craniotomy — to remove a blood clot above his left eye on July 14, 2017.

They discovered it whilst doing the blood clot surgery, did path and got the results back. The blood clot was associated with the glioblastoma.

Both United States Senator Edward “Ted” Kennedy and Delaware attorney general Beau Biden, the son of former Vice President Joe Biden, died of glioblastoma.

Interesting, that.