I had an aneurysm diagnosed just as I started breast cancer treatment. Not related to treatment, just happen to find during CT scan. It was calcified, so treatment was just low dosage aspirin and monitoring. No one mentioned effect on platelets which stayed in normal range during chemo. They were checked before every chemo session.

If you were seen for stroke at Mayo, checked the portal notes. The ER or other drs might of documented the conversation with oncologist in visit notes. Also, may show if they talked to your oncologist or a oncologist on call over holiday weekend.

Good luck
Laurie