alexa Expression of cytokeratin 7 in simultaneous mucinous tumors of the ovary and appendix.
Oncology

Oncology

Archives of Surgical Oncology

Author(s): Guerrieri C, Frnlund B, Boeryd B

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Abstract Cytokeratin 7 (CK-7) is a simple epithelial keratin that may be used to investigate the site of origin of adenocarcinomas. In fact, CK-7 is present in ovarian epithelial neoplasms but is generally absent in colonic carcinomas. This pattern of CK-7 expression may aid in elucidating the genesis of mucinous tumors occurring simultaneously in the ovary and appendix, accompanied by psuedomyxoma peritonei. Five such cases were immunostained with anti-CK-7, and all showed a concordant staining pattern of the appendiceal, ovarian, and peritoneal lesions. Two cases showed a negative reaction for CK-7 and thus would appear to represent ovarian and peritoneal metastases from an appendiceal primary tumor. Three cases were CK-7 positive, and the nature of these mucinous lesions remains open to debate; they may either represent independent primary tumors or originate from the appendix. For comparison, five Stage I mucinous borderline tumors of the ovary and their normal appendices were also stained with anti-CK-7. These ovarian tumors were all CK-7 positive, whereas the appendices were negative. It is concluded that CK-7 is capable of distinguishing a group of tumors that can reliably be classified as primary appendiceal neoplasms metastatic to the ovaries and peritoneum.
This article was published in Mod Pathol and referenced in Archives of Surgical Oncology

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