The MicroPET imaging study was performed on athymic nude mice (n = 3) bearing Hsp90-positive PL45 human pancreatic ductal adenocarcinoma xenografts and inflammatory lesions (n = 3) at 1 and 2 hours after 18F-NOTA-San A injection. This evidence concerns the gene HSP90AA1 and pancreatic ductal adenocarcinoma.