Roentgenological study on the uterotubal junction

Uterotubal junction were carefully observed on the hysterosalpingograms of 400 cases. The morphological classification and results are obtained as follows: A. Classification. 1. Uterotubal junction without pretubal bulge. Type I : No constriction or filling defect. Type II : Linear filling defect. Type III : Only suggestive constriction. 2. Uterotubal junction with pretubal bulge and constriction. Type IV : Triangular shaped pretubal bulge. Type V : Funnel shaped pretubal bulge. Type VI : Club shaped pretubal bulge. 3. Uterotubal junction with pretubal bulge and interruption. Type VII : Triangular shaped pretubal bulge. Type VIII : Funnel shaped pretubal bulge. Type IX : Club shaped pretubal bulge. B. Type I was observed in 173 cases (43.5%), the most frequent type, and Type VIII in 61 cases (15.3%), Type II in 51 cases (12.8%), Type VI in 49 cases (12.3%), Type V in 32 cases (8.0%), Type VII in 32 cases (8.0%), Type III in 26 cases (6.5%), Type IX in 24 cases (6.0%), Type IV in 19 cases (4.8%) in decreasing number. C. There was no significance in distribution and combination of the types except for the fact that bilateral combination is more often than unilateral distribution