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Ependymal and choroid plexus tumors. Cytokeratin and GFAP expression
Author(s) -
Mannoji Hiromichi,
Becker Laurence E.
Publication year - 1988
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19880401)61:7<1377::aid-cncr2820610717>3.0.co;2-w
Subject(s) - choroid plexus , cytokeratin , ependymal cell , pathology , ependyma , glial fibrillary acidic protein , ependymoma , choroid plexus papilloma , biology , immunohistochemistry , medicine , central nervous system , endocrinology
Twenty‐six ependymal and 15 choroid plexus tumors were examined with monoclonal antibody against cytokeratin using the avidin‐biotin‐peroxidase complex (ABC) technique. Serial sections were examined with antisera to glial fibrillary acidic protein (GFAP). In five ependymal tumors (one ependymoma, two papillary ependymomas, and two primitive neuroectodermal tumors [PNET] with ependymal cells), a variable number of cytokeratin‐positive cells were present. Most tumor cells (except two PNET) were positive with GFAP antisera. Many cytokeratin‐positive cells were present in all choroid plexus tumors. GFAP‐positive cells were present focally in six of 11 papillomas and in one of four carcinomas. Although their staining patterns and distribution were clearly different, focal coexistence of cytokeratin and GFAP was observed in six papillomas and two ependymal tumors. Thus, some ependymal tumors (especially papillary ependymomas and occasional PNET) and many choroid plexus tumors have demonstrable positivity with antibody to cytokeratin, suggesting a transitional cell type with features of both ependyma and choroid plexus.