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RecruitingInterventional

Ommaya Reservoir Placement at the Time of Biopsy for Longitudinal Biomarker Collection

NCT ID: NCT06322602Sponsor: Mayo ClinicLast updated: 2026-03-03

Summary

This observational trial evaluates the use of Ommaya reservoir placed during a biopsy to collect biomarkers longitudinally in patients with brain tumor. A biomarker is a measurable indicator of the severity or presence of the disease state. An Ommaya reservoir is a small device that's implanted under the scalp. It allows the doctor to take samples of cerebrospinal fluid (CSF) in the future without doing a spinal tap. The identification of biomarkers in CSF is rapidly emerging as a promising minimally invasive approach for monitoring tumor growth and response to therapy. In the future, these biomarkers may be used to help determine what treatments could be most effective and how well a tumor has responded to prior therapy. Currently, limited long-term access to CSF has made it difficult for studies to learn if collecting CSF at different points in the treatment process is useful. Having an Ommaya reservoir placed during a biopsy may allow for longitudinal biomarker collection in patients with brain tumor.

Arms & interventions

  • ProcedureIntracranial Catheter Placement

    Undergo Ommaya reservoir placement

  • ProcedureLumbar Puncture

    Undergo LP

  • ProcedureBiopsy

    Undergo biopsy

  • ProcedureBiospecimen Collection

    Undergo CSF sample collection

  • ProcedureComputed Tomography

    Undergo CT

  • ProcedureMagnetic Resonance Imaging

    Undergo MRI

Outcome measures

Primary

  • Feasibility of Ommaya reservoir placement

    Will be assessed based on the percent of patients for whom an Ommaya reservoir is successfully placed at the time of tissue biopsy without attributable complication.

    Time frame: Up to 5 years

Secondary

  • Utility of Ommaya reservoir

    Time frame: Up to 5 years

Eligibility criteria

Sex: AllAge: 18 Years and olderHealthy volunteers: No
Inclusion Criteria: * Clinical and radiographic evidence suggesting a diagnosis of a brain tumor * Planned biopsy for suspected or previously diagnosed brain tumor as part of routine clinical care at Mayo Clinic (Rochester, Minnesota \[MN\]) * Willingness of the patient to provide informed consent * Patient is willing to have their Ommaya sampled on at least 2 future occasions * Patients is willing to have CSF banked through the neuro-oncology biorepository (requires a separate signature) Exclusion Criteria: * Adults lacking capacity to consent * Vulnerable populations including pregnant women, prisoners, and individuals \< 18 years old * Patients who are not appropriate candidates for biopsy due to current or past medical history or uncontrolled current illness * Prior history of any wound infection * Any patient who the surgeon feels is not an optimal candidate for Ommaya reservoir placement. Such reasons may include, but will not be limited to, surgical anatomy, clinical evidence of immunosuppression, and/or elevated risk of wound infection due to diabetes, smoking history, morbid obesity, or any other concerns

Study locations (1)

Mayo Clinic in Rochester

Rochester, Minnesota, 55905

Recruiting
Clinical Trials Referral Office · Contact
855-776-0015mayocliniccancerstudies@mayo.edu
Terry C. Burns, M.D., Ph.D. · Principal Investigator