A Rare Collision Tumor Composed of Follicular Lymphoma and Adenocarcinoma in the Ampulla of Vater: A Case Report

<table>Macroscopic findings of the tumor. The tumor of the ampulla of Vater forms a mass with ulceration and multiple small nodular lesions are found around it.</table>

Case Reports in Pathology

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Figure 3: A Rare Collision Tumor Composed of Follicular Lymphoma and Adenocarcinoma in the Ampulla of Vater: A Case Report 