Fallopian tubes, removed at operation from 100 tubal ectopic pregnancies, were injected with barium sulphate/gelatine suspension and radiographs taken. Histologic sections were then examined. One hundred control tubes were treated in the same fashion, and the findings in the two groups were then compared. The tubes from 50 autopsies of infants and children were also injected with contrast medium and studied microscopically in a search for congenital lesions. Tubal diverticula were found in 49percnt; of gravid tubes as compared with 11percnt; of those of the control group. Diverticula were confined to the isthmus and the proximal portion of the ampulla. They were not seen in the tubes of infants and children examined at autopsy, but an etiologic relationship with chronic inflammation was suggested. On the basis of this study, it appears also that the lesions referred to as salpingitis isthmica nodosa are in fact diverticula.
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