(A) Pancreatic epithelium infiltrated by adenocarcinoma with large signs of regression (white arrows) (60x); (B) Tumor regression, which consists of multiple microscopic foci of infiltration into the macroscopic nodular area (black arrow) (100x). Neoadjuvant chemoradiation therapy for borderline pancreatic adenocarcinoma: report of two cases: Galindo J, Gabrielli M, Guerra JF, Cassina JC, Garrido M, Jarufe N, Borghero Y, Madrid J, Zoroquiain P, Roa JC, Martínez J - World journal of surgical oncology (2013). Not altered. CC.