We previously imaged Hsp90 expression in pancreatic cancer using 64Cu-labeled dimeric Sansalvamide A decapeptide, which was measured to be 2.97 ± 0.58 %ID/g at 2 hours and 2.87 ± 0.60 %ID/g at 4 hours post-injection in PL45 tumor mouse xenografts. This evidence concerns the gene HSP90AA1 and neoplasm.