Abstract
A radical mastoidectomy for the purpose of improving hearing, given to a 32-years-old man who was suffering from otitis media chronica simplex, disclosed that his well-developed middle-ear cells contained a large quantity of cholesterin crystals and a large number of giant-cells, a probable product of the curative reaction to the foregn body. It was presumed from the clinical progress of the conditions and the histological observations that this was one of the cases of the so-called “Otitis Media Chronica Cholesteatosis” without forming cholesteatoma.
