“…Nowadays, although mortality due to AO is close to zero in many countries, different frequencies are observed by patient series (Gutierrez, ). The mortality at the CUH between 1923 and 1929 was relatively high (23.3%), when compared with frequencies ranging from 5% (Amberg & Ghormley, ) to 25% (Shandling, ), which indicated that mortality depends on the age of the patient, the stage of infection, and the treatment employed. Unfortunately, information about the specific cause of death of the patients studied here was not found; consequently, it is not known whether they died due to surgery, which was mainly drastic and immediate, or due to the advanced state of infection, or more probably, a combination of both.…”