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Τρίτη 9 Μαΐου 2017

Low-grade Cribriform Cystadenocarcinoma: A Review of the Literature and Case Report

imageSummary: Low-grade cribriform cystadenocarcinoma (LGCCC) is a rare tumor of the salivary gland that most often arises from the parotid gland. A 51-year-old man developed a small mass on the right parotid gland 5 years ago. A preoperative magnetic resonance image showed abnormal intensity, an atypical characteristic for such a tumor; therefore, the diagnosis was difficult. Thus, a superficial parotidectomy was performed as a total excisional biopsy to remove the tumor. Histopathological analyses revealed that the tumor was composed of a single cyst comprising cells containing mucosal fluid, with proliferation of large cells. Also, proliferation of the tumor epithelium showed a papillary cribriform pattern of proliferation with a partial ring form, and the tissue inside the tumor was replaced by a hematoma. Mild cellular atypia was observed. Immunostaining for S-100 was positive, and the Ki-67 ratio was

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