“…Squamous differentiation in primary pancreatic ACA has long been associated with poor survival in clinical series [1,5,6,10,14,15,16,17], case reports [3,7,18,19,20,21,22,23,24,25,26,27,28,29,30], a meta-analysis [31], and a tumor registry study [32]. Thus, growing evidence has unequivocally shown that squamous features seen in a resection specimen portend poor prognosis so should be reported even if they are focal [6].…”