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One-Patient trial tests keytruda for rare ovarian cancer

NCT ID NCT05368207

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested the drug pembrolizumab (Keytruda) as a follow-up treatment for one patient with a rare type of ovarian cancer called small cell carcinoma of the ovary, hypercalcemic type (SCCOHT). The goal was to see if the drug could help keep the cancer from coming back. Because only one person took part, the results are very limited and cannot be generalized.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Pembrolizumab (Keytruda), a drug that helps the immune system fight cancer
What this could lead to
If it works, this could point toward a treatment option for a rare and aggressive ovarian cancer.
What could go wrong
This is a single-patient study with no control group, so results may not apply to others. The drug may not prevent cancer from returning and can cause immune-related side effects.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

1 person

The number who actually took part.

Started

Dec 2021

Finished

Oct 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patient with small cell carcinoma of the ovary, hypercalcemic type (SCCOHT) Exclusion Criteria: * N/A

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Princess Margaret Cancer Centre

    Toronto, Ontario, M5G 2M9, Canada

More trials for these conditions

Other studies related to the condition(s) this trial covers.