RATIONALE: Diagnostic procedures, such as 3'-deoxy-3'-\[18F\] fluorothymidine (FLT) PET imaging, may help find and diagnose cancer. It may also help doctors predict a patient's response to treatment and help plan the best treatment. PURPOSE: This phase I trial is studying FLT PET imaging in patients with cancer.
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Measurement of the uptake and retention of 3'-deoxy-3'-[18F] fluorothymidine (FLT) in tumors and normal organs
Timeframe: at time of PET or CT PET Scan
Changes in thymidine kinase, thymidylate synthase, and standardized uptake values
Timeframe: before and after therapy