Ping heaters coleman

Father died of cancer in the pancreas, but on death certificate it says gastroenteritis? - cancer pancreas condition_symptoms

My father died early on that all new suffering from cancer of the pancreas, but today, when he had his proof of the death of cancer of the states and gastroenteritis?

I wrote online, but not useful to explain what happens after cancer of the pancreas, but I am confused. What is death?