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Ovarian CancerMay 2023Summary reviewed June 2026

What the SORAYA Study Found — Mirvetuximab Soravtansine for Platinum-Resistant Ovarian Cancer

Researchers tested mirvetuximab soravtansine in 106 women with ovarian cancer that stopped responding to platinum chemotherapy and had high levels of a protein called folate receptor alpha. About one in three patients saw their tumors shrink, and responses lasted a median of nearly 7 months.

What the trial was testing

The SORAYA enrolled 106 patients with ovarian cancer. The study was sponsored by ImmunoGen, Inc. and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was initial testing (phase 2). Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

32% of patients with hard-to-treat ovarian cancer responded to this targeted antibody-drug treatment.

Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2023 · NCT04296890

These findings — that about one in three patients saw their tumors shrink with this targeted treatment — were published in the Journal of clinical oncology : official journal of the American Society of Clinical Oncology and represent the headline result of the study.

Researchers tracked outcomes across 106 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with ovarian cancer, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

Mirvetuximab soravtansine received FDA approval in 2022 for platinum-resistant ovarian cancer with high folate receptor alpha expression. If you have ovarian, fallopian tube, or peritoneal cancer that hasn't responded to platinum therapy, ask your oncologist about testing for folate receptor alpha and whether this treatment is right for you.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.