my friend 78 yrs old, was in good health, diagnosed with prostate cancer approx 4years ago, has had acid reflux pretty bad where he gets clogged up in the stomach area, twice had to have small surgery to unblock. He has been in the hospital for 2 weeks first told Pneumonia, put in a induced coma for several days until finished running tests, so he could rest. Now, hospital says he is bleeding from kidneys. What does this mean