Of great interest in the literature on otosclerosis for 1936 is a contribution by T. H. Bast1 on the development of the otic capsule, with special reference to fetal and infantile changes in the region of the fissula ante fenestram and their probable relation to the formation of otosclerotic foci.Since 1930, under the auspices of the Research Council of the American Otological Society, T. H. Bast has studied the fissula ante fenestram, that tiny cleft which lies in the bone just in front of the oval window and in the region in which otosclerotic foci most often develop. It extends from the vestibule to the middle ear, is filled with connective tissue and is surrounded by a narrow rim of cartilage. The normal fissula varies from a narrow slit to a large and massive area. In some children's ears the fissula has been found to be partly or
SHAMBAUGH GE. CHRONIC PROGRESSIVE DEAFNESS INCLUDING OTOSCLEROSIS AND DISEASES OF THE INNER EAR. Arch Otolaryngol. 1937;26(5):583–605. doi:10.1001/archotol.1937.00650020637007
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