Assessment of Head and Neck Tumor Hypoxia Using 18F-Fluoromisonidazole
The purpose of this clinical research study is to answer the following questions using 18F-fluoromisonidazole as an imaging agent:
- Do cells exist in human tumors that are at very low oxygen levels (hypoxic cells)?
- If hypoxic cells exist in human tumors, do they effect the ability of radiotherapy to control human tumors?
- Can Positron Emission Tomography (PET scanning) detect hypoxic cells in human tumors?
Squamous Cell Carcinoma
Head and Neck Neoplasms
Procedure: PET scan
|Study Design:||Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||Assessment of Head and Neck Tumor Hypoxia Using 18F-Fluoromisonidazole|
- Direct Oxygen Measurements [ Time Frame: PET scan and needle measurements will be repeated every 4 weeks into the course of radiotherapy and again after the completion of radiotherapy. ] [ Designated as safety issue: No ]
|Study Start Date:||January 1994|
|Study Completion Date:||June 2003|
|Primary Completion Date:||June 2003 (Final data collection date for primary outcome measure)|
|Experimental: PET + 18F-fluoromisonidazole||
Small amount of radioactive traces drug given by intravenous injection prior to PET Scan
Other Name: 18F-FMISOProcedure: PET scan
Series of pictures using 20 minute scan performed 2 hours after an 18F-fluoromisonidazole injection
Hypoxic (low oxygen) cells have long been known to exist in animal tumors. It is also known that hypoxic cells are more difficult to eliminate with radiotherapy than tumor cells at normal levels of oxygen (normoxic cells). However, the extent to which hypoxic cells limit the curability of human tumors is uncertain. To determine if hypoxic cells exist in human tumors and how hypoxic cells might influence the efficacy of radiotherapy, this study involves direct measurements of oxygen levels in human tumors compared to the tumor uptake of the experimental drug, 18F-fluoromisonidazole (18F-FMISO), visualized with PET scanning. 18F-fluoromisonidazole has been used with PET imaging to tell the difference between growing tumors which have high and low oxygen content.
Before beginning radiotherapy, a PET scan (series of pictures, 20 min. scan) will be performed at 2 hours after an intravenous injection of a small amount of radioactive traces drug, 18F-fluoromisonidazole (18F-FMISO) to observe the active hypoxia tumors areas. Upon completion of the 18F-FMISO PET scan, direct oxygen measurements will be obtained by placing a small needle into the tumor under computer tomographic (CT) guidance. The PET scan and needle measurements will be repeated every 4 weeks into the course of radiotherapy and again after the completion of radiotherapy. The measurement obtained by 18F-FMISO PET scanning (non-invasive technique) and by direct needle measurements (invasive technique) will be correlated with the eventual treatment outcome for future use.
|United States, Texas|
|University of Texas M. D. Anderson Cancer Center|
|Houston, Texas, United States, 77030|
|Study Chair:||Donald A Podoloff, M.D.||UT MD Anderson Cancer Center|