While there are a multitude of ways a physician can commit malpractice, there are a number of typical types of malpractice. For instance, sometimes doctors will fail to diagnose a curable condition where they should have diagnosed it. This sometimes is seen in the context of cancer. Also, sometimes doctors damage the body in surgery in ways that are preventable by exercising reasonable skill. Additionally, sometimes doctors perform surgery on the wrong body part or fail to obtain proper consent for a given procedure.
These examples are illustrative but they do not represent every type of malpractice possible.