LEMPERT FENESTRA NOV-OVALIS WITH MOBILE STOPPLE: A NEW ADVANCE IN THE SURGICAL TREATMENT FOR CLINICAL OTOSCLEROSIS EVOLVED AS A RESULT OF A RESEARCH STUDY OF ONE THOUSAND CASES IN WHICH FENESTRATION HAS BEEN PERFORMED DURING THE LAST SEVEN YEARS

Abstract

"Otosclerosis" is the name employed to describe a lesion observed histologically within the bony labyrinthine capsule and also a form of deafness which this lesion occasionally gives rise to before histologic evidence of the presence of an otosclerotic process is obtainable. The lesion known as otosclerosis, which consists of circumscribed, sharply defined, inlaid bony tumors within the otic capsule, has been found during routine histologic examination of the temporal bones of persons who were never known to be deafened, within one or more of the following regions of the otic capsule: the oval window, the round window, the cochlear capsule and the fundus of the internal auditory meatus. The site of predilection for this lesion, however, has been observed to be the region of the oval window, though on rare occasions this region was free of it while other areas of the otic capsule were involved. Whenever the otosclerotic