IN THE past few years a number of rather complete articles and reports have appeared in the literature on this subject. In order to conserve space I am purposely omitting a bibliography and instead refer the reader to a rather complete list found in a report of McGovern1 and in an article by Sheehan and Swanker.2 The purpose of this article is to report three cases previously not published, one a follow-up after 24 years.
As to the factor of heredity, Stewart,3 in 1931, reported on bilateral atresia in sisters; an infant brother died of asphyxiation, probably due to the same cause. Wilkerson4 cited Lang as reporting a boy, his sister, mother, possibly a brother, and maternal aunt, with bilateral atresia. Wilkerson himself reported complete bilateral bony atresia in three sisters. McGovern,1 in 1950, reported occlusion in a mother and her child. Cabaniss, of Roanoke,