Evaluation of [18F]FLT PET/CT as an Early Predictor of Outcome in Pediatric Solid Tumors

The University of Texas System (UT)

Status and phase: Withdrawn; Early Phase 1

Conditions: Solid Tumor

Treatments: Drug: [18F]FLT-PET/CT

Study type: Interventional

Funder types: Other

Identifiers

NCT03905538

STU-2019-0627

Details and patient eligibility

About

The experimental [18F]FLT-PET/CT will be completed before initiation of chemotherapy at either diagnosis or initiation of salvage chemotherapy at relapse and prior to the third cycle (or month) of chemotherapy. Laboratory analysis and correlative radiology, as directed per clinical care based on the primary diagnosis, are required within 30 days of the baseline [18F]FLT PET/CT. Follow-up will comprise 24 months of standard practice treatment and follow up.

Full description

Primary Objective is to assess if percentage change in [18F]FLT PET/CT quantitative parameters (SUV max, or SUV peak or proliferative tumor volume) after 2 cycles of chemotherapy can predict progression free survival at 1 and 2 years in pediatric patients with newly diagnosed or relapsed solid tumors.

Secondary Objectives are: (1) to assess if percentage change in [18F]FLT PET/CT quantitative parameters (SUV max, or SUV peak or proliferative tumor volume) after 2 cycles of chemotherapy can predict overall survival at 2 years in pediatric patients with newly diagnosed or relapsed solid tumors; and (2) for enrolled patients that undergo tumor resection as part of their therapy regimen within one month of the FLT imaging, mitotic index of the tumor will be assessed as compared to initial biopsy specimen and correlate with FLT activity.

Sex: All

Ages: 8 to 25 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients with histologically confirmed solid tumor malignancies with residual tumors present that require standard of care chemotherapy for a minimum number of cycles. All anatomical sites and all tumor histologies are eligible including central nervous system tumors. Both newly diagnosed and/or newly relapsed patients are eligible.
• Patients ages 8 - 25 years
• In the opinion of the investigator, patients must be thought to be able to lie still for imaging without sedation for 20 - 30 minutes.
• Patients must have a performance status of > 50% (Lansky or Karnofsky).
• Patients of childbearing potential must have a negative urine or serum pregnancy test as per institution's standard of care within 7 days prior to [18F]FLT PET/CT imaging.
• Ability to understand and the willingness to sign a written informed consent/assent.

Exclusion criteria

• Patients with known allergic or hypersensitivity reactions to previously administered radiopharmaceuticals of similar chemical or biologic composition to [18F]FLT
• Newly diagnosed subjects who had prior chemotherapy or radiotherapy before enrollment in the study. Relapsed patients are eligible prior to starting their relapsed chemotherapy regimen if they meet the other eligibility criteria.
• Subjects for whom chemotherapy is not a standard of care primary therapy option.
• Patients who are pregnant or breast-feeding.
• Patients with no residual tumor (i.e. complete resection at diagnosis or relapse).

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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0 participants in 1 patient group

[18F]FLT-PET/CT Arm

Experimental group

Description:

The experimental \[18F\]FLT-PET/CT will be completed before initiation of chemotherapy and prior to the third cycle (or month) of chemotherapy. Laboratory analysis and correlative radiology, as directed per clinical care based on the primary diagnosis, are required within 30 days of the baseline \[18F\]FLT PET/CT. Follow-up will comprise 24 months of standard practice treatment and follow up.

Treatment:

Drug: [18F]FLT-PET/CT