These findings were supported by a recent and more detailed report [100] in which the microPET study did not show preferential activity uptake in tumors relative to surrounding skeletal muscle; furthermore, in all studied tumor types, the tumor: blood activity uptake ratio was < 1 during 2 h post injection of the tracer, and the obtained binding potential (BP) was similar in EGFR positive and negative xenografts. This evidence concerns the gene EGFR and neoplasm.