The study should evaluate the biological distribution of 99mTc-1-thio-D-glucose in patients with primary brain tumors and recurrence of brain tumors.

The primary objective are:

1. To assess the distribution of 99mTc-1-thio-D-glucose in normal tissues and tumors at different time intervals.
2. To evaluate dosimetry of 99mTc-1-thio-D-glucose.
3. To study the safety and tolerability of the drug 99mTc-1-thio-D-glucose after a single injection in a diagnostic dosage.

The secondary objective are:

1. To compare the obtained SPECT imaging results of brain tumors with the data of magnetic resonance imaging (MRI) and/or positron emission tomography (PET) and immunohistochemical (IHC) studies of postoperative material.

The overall goal is to study the effectiveness of SPECT imaging of primary brain tumors and relapse of brain tumors using technetium-99m labeled glucose.

Phase I of the study:

Biodistribution of 99mTc-1-thio-D-glucose in patients with primary brain tumors and in patients with recurrence of a brain tumor.

The main objectives of the study:

1. To evaluate the distribution of 99mTc-1-thio-D-glucose in normal tissues and tumors in patients with brain tumors at different time intervals.
2. To evaluate dosimetry 99mTc-1-thio-D-glucose based on the pharmacokinetic parameters of the drug after a single intravenous administration.
3. To study the safety of use and tolerability of the drug 99mTc-1-thio-D-glucose after a single intravenous administration in a diagnostic dosage.

Additional research tasks:

1. To conduct a comparative analysis of the diagnostic information obtained in the visualization of brain tumors by SPECT using 99mTc-1-thio-D-glucose with data obtained by magnetic resonance imaging (MRI) and/or positron emission tomography (PET) and immunohistochemical (IHC) research of postoperative material.
2. To study the diagnostic effectiveness of 99mTc-1-thio-D-glucose SPECT in imaging of brain tumors.
3. To evaluate the overall survival of patients with brain tumors depending on the results of 99mTc-1-thio-D-glucose SPECT.

Methodology:

Open-label, exploratory, single centre study. The subjects will receive a single injection of the labelled tracer.

Inclusion Criteria:

• Subject is > 18 years of age
• Clinical and radiological diagnosis of a primary brain tumor or recurrence of a brain tumor with immunohistological verification.
• Clinical and radiological diagnosis of a benign intracranial lesions.
• White blood cell count: > 2.0 x 10^9/L
• Haemoglobin: > 80 g/L
• Platelets: > 50.0 x 10^9/L
• alanine amino transferase (ALT), alkaline phosphatase (ALP), aspartate aminotransferase (AST): =< 5.0 times Upper Limit of Normal
• Bilirubin =< 2.0 times Upper Limit of Normal
• Serum creatinine: Within Normal Limits
• Blood glucose level not more than 5.9 mmol/L
• A negative pregnancy test (serum beta-human chorionic gonadotropin, beta-HCG) at screening for all patients of childbearing potential. Sexually active women of childbearing potential participating in the study must use a medically acceptable form of contraception for at least 30 days after study termination
• Subject is capable to undergo the diagnostic investigations to be performed in the study
• Informed consent

Exclusion Criteria:

• Second, non-brain malignancy
• Active current autoimmune disease or history of autoimmune disease
• Active infection or history of severe infection within the previous 3 months (if clinically relevant at screening)
• Known HIV positive or chronically active hepatitis B or C
• Administration of other investigational medicinal product within 30 days of screening
• Ongoing toxicity > grade 2 from previous standard or investigational therapies, according to US National Cancer Institute's

Deidentified individual participant data (text, tables, figures, and appendices), underlying the results of the trial, will be shared with researchers to achieve the aims in the approved proposal.

Proposals may be submitted up to 36 months following publication of the results of the trial. After 36 months, the data will be available in the Center's data ware house but without investigator support other than deposited metadata.

Information regarding submitting proposals and accessing data may be requested from the principal investigator by e-mail.