Abstract
In responding to your committee's invitation to prepare a paper on this particular subject, my first impulse was to decline the task as presenting too many difficulties. The subject is manifestly too broad to be adequately outlined in a single paper. I hope, however, that my paper may serve the purpose of inducing a larger and more useful discussion by others. Chronic catarrhal otitis media is an elastic term, rather indefinitely applied to a variety of tympanic conditions, which are, perhaps, best considered under the following headings: 1. Chronic tubal catarrh, without marked tympanic changes other than those due to retraction of the membrana tympani. 2. Chronic hypertrophic otitis media. 3. Chronic hyperplastic otitis media; dry middle ear catarrh; otosclerosis. Obviously no classification is of practical value which divides these cases into groups which can not be recognized clinically. The differential diagnosis is not easily reduced to any system
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