Could the transvaginal ultrasound not catch ovarian cancer on time before it spreads to other organs?

Possibly: The transvaginal ultrasound (u/s) is arguably the best screening tool for ovarian cancer (oca) but certainly the quality of the u/s and the state of the oca when it was discovered can affect the value of the early diagnosis. A recent study comparing the survival of persons whose oca was detected by u/s to those diagnosed by other means showed significant increased survival in the u/s group.

Ovarian Cancer: Ultrasound imaging is at best a crude screening tool to detect micrometastases, and while it is excellent for detecting sizable masses, it cannot see tiny nests of tumor cells that might have spread beyond the ovary into the pelvis or abdomen. More sophisticated imaging studies, such as MRI and ct scans, combined with diagnostic sampling of tissues and fluids, are better at detecting cancer spread.