(CNN) – It was a big shock for college football fans when ESPN reporter Edward Aschoff died on Christmas Eve, his 34th birthday. But now, we’re learning more about why he passed so suddenly.

Aschoff’s fiancee said after his autopsy, they found out he had stage four Non-Hodgkin’s lymphoma in his lungs, an aggressive kind of cancer that can be undetectable until it’s very advanced.

When Aschoff died, he’d been diagnosed with multi-focal pneumonia and HLH, which affects the immune system.

His fiancee explained that both pneumonia and Non-Hodgkin’s lymphoma can trigger HLH. All of this combined is what led to his decline and eventually his passing.

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