F1 1978 Monza Ronnie Peterson fatal crash

At the hospital, Peterson's X-rays showed he had 7 fractures in one leg and 3 in the other. After discussion with Ronnie himself, the surgeons decided to operate to stabilize the bones. Unfortunately, during the night, bone marrow went into Peterson's bloodstream through the fractures, forming fat globules on his major organs including lungs, liver, and brain. By morning he was in full renal failure and was declared dead a few hours later. The cause of death was given as fat embolism