ARF6 and cancer: Toward this end, we have started two prospective clinical validation studies (UMIN #000021938 and UMIN #000031970) at the Kochi Medical School Hospital, Kochi Health Sciences Center, Hata Prefectural Hospital, and Kanagawa Cancer Center to assess the utility of SNORA74A, SNORA25, WASF2, and ARF6 as potential diagnostic markers for the early detection of PDAC in comparison with CA19‐9.