Peetster

There are four categories: Who, What, Where and Why. Some will be easy, some not. I have as many as six clues to help you along, which I'll supply as needed.

Please limit yourself to one guess, and another guess for each clue I supply. No questions asking for help or hints are allowed. Partially correct answers won't be acknowledged.

Wild guesses and comments are fine. In fact, they can add to the mystery and are fun to read.

The Case:
A man feels perfectly fine. He has no symptoms of any disease and feels no pain. After a brief exam by a doctor, he is told he needs surgery. He has the operation and goes home bleeding profusely and in excrutiating pain. The doctor declares the operation a success and tells the man to go back to work as soon as possible.

The mystery:
What kind of degree does the doctor have and what did the surgery accomplish?