Abstract: autopsy cases related to the death of non-malpractice medical tangle from 1972 to 1998 were studied retrospectively 111 (53 88%) were died of natural diseases, 82 (38 81%) inevitable complications and 13 (6 31%) unpredictable medical accidents For the cause of medical tangles, the diagnosis of 92 cases (44 66%) was questioned The other disputes focused on the infusion/blood transfusion (31 cases, 15 05%), the injection (20 cases, 9 71%), drug misuse and delay in making diagnosis or giving treatment (18 cases, 8 74%respectively) 13 cases (13 11%) involved complains on medical staff's rudeness and hospital management

Key words: non-malpractice medical tangle, forensic autopsy, classification, cause of death