"In order to prevail in a medical malpractice action, the patient must prove that an injury resulted from the substandard medical care. If the patient has other medical conditions, the patient may have to prove that a claimed injury was caused by the alleged medical negligence and not by a different medical condition. Not all incidents of medical malpractice will support a medical malpractice claim, as even a clear medical error may not result in damages to the patient. Damages are a necessary element of a medical malpractice claim. If the patient's treatment or prognosis is not affected by the negligent act or omission, the patient may not be entitled to compensation."