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Ampullary (AMP) carcinomas comprise a heterogeneous group of cancers lacking adequate subcategorization. In the present study, 249 strictly defined primary AMP carcinomas (ACs) identified in 1469(More)
BACKGROUND There has been no uniform terminology for systematic analysis of mass-forming preinvasive neoplasms (which we term tumoral intraepithelial neoplasia) that occur specifically within the(More)