Yes, he died of renal (kidney) failure, but it was the result of battling malaria as I understand it? That's what many sources are saying.
"El Sonbaty, 47, passed away, allegedly from malaria, leading to kidney failure, this week."
From: http://www.ironmanmagazine.com/blog/...ty-dead-at-47/
So, you are saying he died of renal failure without a direct cause?