As a result of medical negligence and malpractice committed by a medical professional in one of the most important medical centers in the country, whose outpatient procedure and lack of medical follow-up caused the death of a young athlete, a sentence was obtained favorable in the first degree in matters of civil liability. In this sense, we were able to demonstrate before the Supreme Court of Justice the negligent behavior of the medical personnel and the relationship of prepossessed principal between the clinic and the doctor and the assistance personnel, evidencing the retention of pure quasi-criminal responsibility, obtaining proof of Gross error due to the lack of comprehensive patient care as provided by our General Health Law, among other legal provisions. Likewise, we achieved that the moral damages were fairly evaluated and with this, we obtained a profit by accepting our original Demand, currently awaiting the new appeal filed by the succumbing parties before the Supreme Court of Justice.