Katy Collins passed away. What happened?

Bellator announced tonight that WMMA fighter Katy Collins passed away on Sept 25th. I thought for sure their would be a thread on this. 

What happened? She was only 32 years old. 

Brain aneurism. 

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"The veteran flyweight competitor was hospitalized last week after suffering a brain aneurysm that led to seizures and a stroke. She died on Sept. 25."

 

https://www.yahoo.com/lifestyle/katy-collins-death-mma-161504833.html

Any word is the aneurism was related to MMA?