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  • Title: Mixed serous cystadenoma with mucinous cystadenoma of the pancreas.
    Author: Abe H, Kimura W, Mori M, Makuuchi M, Yanagisawam A.
    Journal: Pancreas; 2005 Jul; 31(1):98-100. PubMed ID: 15968256.
    Abstract:
    We report a case of serous cystadenoma of the pancreas mixed with mucinous cystadenoma. A 65-year-old woman was admitted to our hospital for evaluation of a palpable, elastic, hard mass measuring 6 cm in diameter in the right upper quadrant of the abdomen. A diagnosis of mucinous cystadenocarcinoma of the pancreas was made, and pancreatoduodenectomy was performed. The tumor was composed of a dominant compartment of macroscopic cyst, and its thick wall was filled with numerous microscopic cysts. The light microscopy findings with hematoxylin and eosin staining, and by the periodic acid-Schiff reaction, were almost perfectly consistent with the characteristics of microcystic or glycogen-rich cystadenoma, but the apical portion of the cytoplasm of the neoplastic cells was stained with Alcian blue at pH 2.4 and by the mucicarmine method. Neoplastic cells containing epithelial acidic mucin are usually found in mucinous cystadenomas. No K-ras point mutations were detected at the sites where neoplastic cells were present, whether or not they contained epithelial acidic mucin. Pancreatic serous cystadenomas that include a mucinous-cystadenoma component are extremely rare, and the difference between serous and mucinous cystadenomas is not always distinct.
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