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Testing a drug called C5252 in people with a tumor inside the skull

Original title: A Phase I/IIa Study of C5252 in Patients With Intracranial Tumor

How far along is this research?

This is a trial that is enrolling or has been updated. It is not a finding yet.

This is an early test in people to check safety.

Status: Recruiting. It is looking for patients now. Talk to your care team about whether it fits you.

The trial team last updated this record on . Always check the trial page for the latest.

The short version

This trial is testing whether a drug called C5252 is safe for people with a brain tumor.

Who this trial is for. This trial is for people who have a tumor inside the skull. It tests a drug called C5252. Some people get one dose. Others get more than one dose.

Where it stands. This trial has not reported results. It is checking how safe C5252 is and how well people handle it. It is also taking an early look at whether the drug helps. Those answers are not in yet.

What this means, and what it doesn't

What it could mean: Someone with a tumor inside the skull could ask their care team about this trial. The care team can say whether it might fit that person's case. They can also explain what taking part would involve.

What it doesn't mean: This does not mean C5252 works. A trial is a test, not a proven treatment. Being in a trial is not a promise that it will help you. It is not a cure.

Source: ClinicalTrials.gov, August 17, 2026 · Read the original

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