1.In the last five years, chronic suppurative otitis media with cholesteatoma formation was seen in 188 cases (26.5%) out of total 709 cases which had been operated.
2. In 2 cases, there was no perforation of the ear drum. In 10 cases, the ear drum was invisible because of the severe lesions of external auditory canal, and in 176 cases, perforation was found. The perforation was found in flaccid portion in 40 cases, in marginal portion in 15 cases, in central portion in 30 cases and 90 cases showed total defect of the ear drum.
3. The clinical findings were coincident with operative findingo in 112 cases (59.5%) out of 188 cases.
4. In 151 cases, 56 cases (37.0%) showed peculiar pictures of bone defect on X-ray, 68 cases (45.0%) were suspicious, and 27 cases (18.0%) were not clear.
5. Mis-diagnosis was made on the X-ray films most commonly in the cases with small-sized localized cholesteatoma.
6. In the X-ray diagnosis of these cases, we recognized that peculiar signs of bone defect as well as clear signs due to the enlargement of tympanic cavities were of great value.
Part 2. Roentogenogram of the pneumatic cells of temporal bone in otitis media cholesteatomatica
1. In 155 cases with cholesteatomas, no case belonged to Ist group of oneumatization, 5 cases (3.3%) belonged to IInd group, 14 cases (9.2%) to IIIrd group, 132 cases (87.5%) to IV th group. In general, the pneumatization was extremly poor, but we need to notice that 5 cases showed good pneumatization.
2. There was no age-prevalence on the degree of pneumatization.
3. In the X-ray diagnosis, the state of pneumatic cells is important, especially we must pay attention of the cases with good pneumatization.
4. Concerning the cause of poor pneumatization, we would not agree to the opinion refers all the causes to congenital and aquired predisposition or constitution.
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