[The ABO group system in tissues in advanced post-mortem changes]

Post-mortem changes and in particular putrefaction makes examination of the group properties of the ABO system in tissues difficult and even more so the interpretation of results. Hitherto traditionally used serological methods, i.e. the absorption elution test and the saturation method, do not always provide sufficient data for a final evaluation. The quoted examples from practice are in favour of a combination of the traditional serological approach (absorption elution test) and the immunohistological technique (indirect immunoperoxidase reaction).