Abstract
The literature on otitis media and its complications, with the omission of meningitis, is reviewed from January 1941 to July 1942. As might be expected, the paramount interest lies in chemotherapy. GENERAL CONSIDERATIONS Day 1 presents an interesting paper on cholesteatoma, in which he states that cholesteatoma resulting from ingrowth of epithelium through the drum membrane should be called pseudocholesteatoma. The lesion may be primary, arising from a defect of Shrapnell's membrane, regarding which there is a difference of opinion, or secondary (more common), from the ingrowth of skin from the external canal into the middle ear, replacing destroyed mucosa. He believes that retraction of Shrapnell's membrane is caused by a closing off of the attic from the middle ear due to the entrance of irritating fluids or foreign material into the latter. One of the causes is the prone-back position in which bottle-feeding infants are placed. Diamant 2 studied the air
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