Spontaneous Human Combustion: myth or reality?

I have not heard of a modern day case of spontaneous human combustion. I can understand SC as it occurs in silos and such, but not having a current case of SC, leads me to believe that these cases were a myth, instead of reality in human burning cases. Today’s modern forensics would surely discount a human body burning from the inside, without any reasonable explanation. Question: since no modern day cases of SC have occured in humans, does this lead you to believe that earlier reported cases were just a myth or are the facts still unknown?