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V. RESIDUAL CARTILAGES AND DEFECTIVE OSSIFICATION AND THEIR RELATION TO OTOSCLEROTIC FOCI

T. H. BAST, PH.D.

Arch Otolaryngol. 1940;32(4):771-782.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The occurrence of residual cartilage or defective ossification in certain parts of the petrous bone in late fetal life or in early childhood has been recognized for some time. In the region of the fissula ante fenestram this defective development was found by Bast,¹ Anson and Wilson,² Anson and Martin³ and Wilson⁴ to occur in a large percentage of fetuses and young children. They suggested that this unstable condition in the region of the fissula ante fenestram may be one of the factors which initiate a late attempt at rebuilding of bone and which may result in sclerotic bone. Since otosclerotic bone usually occurs in this region and replaces the residual cartilages, the interpretation sounds plausible.

Another place where such residual cartilages occasionally occur is the region of the "fossula post fenestram." Bast⁵ showed that residual cartilage or defective ossification in this location is rare and found it in only . . . [Full Text PDF of this Article]

Author Affiliations
MADISON, WIS.

From the Department of Anatomy, the University of Wisconsin.

Footnotes
This study is supported in part by the Central Bureau of Research of the American Otological Society and the Wisconsin Alumni Research Foundation.

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