A Rare Collision Tumor: Adenocarcinoma in the Ampulla of Vater and Neuroendocrine Tumor in the Lower Part of the Common Bile Duct

Mitsuhiro Tachibana; Kazuyasu Kamimura; Kei Tsukamoto; Yutaka Tsutsumi; Mitsuhiro Tachibana; Kazuyasu Kamimura; Kei Tsukamoto; Yutaka Tsutsumi

doi:10.7759/cureus.15882

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