The usefulness of ultrasonography in intracavitary radiotherapy using selectron applicators.

Uterine perforation can occur during the procedure of intracavitary insertions for the treatment of carcinoma of the cervix. If radiation treatment proceeds in the situation of inadvertent perforation, severe complication may result. The ultrasonographic studies of five patients with metal intrauterine applicators in situ are described. The applicator appeared as a linear echogenic density within the uterine cavity. The thickness of the uterine wall and the fundus could be clearly identified in a normal insertion. In the presence of uterine perforation, the applicator was seen traversing the myometrium necessitating alteration of the treatment plan.