<s>[INST] Contrast material was instilled into the uterine cavity via a catheter in the cervix and shows visualization of the uterine cavity. The multiple filling defects in the uterine cavity represent air bubbles. The left fallopian tube filled with spillage on the left. There was no evidence of filling of the right fallopian tube. What does this mean [/INST] Mostly, they put air bubbles while injecting dye into the uterine cavity. Not Significant. Except that you don't get as good of a picture and It's hard to spot irregularities in the wall of the uterus; these can be polyps or cancer. The lack of filling can be a problem with either the procedure (like bubbles preventing the flow of dye) or a problem with the fallopian tube which can be blocked by infection, scarring, growth, deformity, etc. </s>