My partner Bill a 70 year old healthy man had a craniotomy October 3 to remove the glioblastoma stage 4 tumor and it was a success. Had some vision loss as the tumor had wrapped around the vision area. He was great after surgery. Walking, taking and seeing. Cognitively he has experienced some challenges and was told not to drive as his peripheral vision is bad. His incision healed well so was able to start 15 treatments of radiation and oral chemotherapy. Took a month off from treatment in December. Then started oral chemotherapy in January 5 days per month and every month since. He tolerated it well so dosage was increased in April . He is still tolerating it well. MRI’s so far have shown no progression. We have our 3rd MRI since the craniotomy next week. We have been traveling and he visits his grandkids in Denver every 8 weeks. Best wishes for your dad’s surgery. Keep me posted how he does.