Hypoxia, meaning a lack of oxygen, has been associated strongly with a wide range of human cancers. Hypoxia occurs when tumor growth exceeds the ability of blood vessels to supply the tumor with oxygenated blood. It is currently understood that hypoxic tumors are more aggressive. Current methods for measuring hypoxia include invasive procedures such as tissue biopsy, or insertion of an electrode into the tumor. EF5-PET may be a non-invasive way to measure tumor hypoxia.
To establish PET imaging with the tracer EF5 as an accurate and reliable method for measuring the oxygen content of a tumor and to establish the measurement of secreted markers in blood as an accurate and reliable method for measuring the oxygen content of a tumor.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
28
Stanford University School of Medicine
Stanford, California, United States
18F-EF5 uptake (tumor: blood ratio) before and after carbogen breathing for a subset of subjects.
Time frame: 1-5 days
18F-EF5 uptake (tumor: blood ratio) before and after administration of DCA for a subset of subjects.
Time frame: 1-5 days
Levels of secreted hypoxia markers in plasma.
Time frame: 1-5 days
Hypoxia gene and protein expression scores in patients undergoing biopsy or surgical resection.
Time frame: 1-5 days
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