title: No prediction of recurrence of meningiomas by PCNA and Ki-67 immunohistochemistry.
abstract: Immunohistochemistry for the expression of the proliferation markers proliferating cell nuclear antigen (PCNA) and Ki-67 was studied in 16 non recurring meningiomas, 11 meningiomas recurring as benign tumors, 6 recurring as atypical meningiomas and in 9 recurring as malignant meningiomas. Non recurring meningiomas were defined in this study as tumors without recurrence at least 8 years after surgery. In addition 16 benign recurrences, 14 atypical- and 12 malignant meningiomas were studied. In each group great variation of labeling indices (LI) = per cent of tumor cells labeled was observed, especially of PCNA LIs. The non recurring meningiomas displayed lower mean LI for PCNA and Ki-67 than did the recurring meningiomas of all groups but the differences were not statistically significant. The same pattern was seen when totally resected tumors were studied alone. Benign-, atypical-, and malignant meningiomas had labeling indices that were related to the grade of malignancy. Only PCNA LIs of atypical- and malignant meningiomas were statistically significantly higher than PCNA LIs of non recurring meningiomas. The study indicates that PCNA and Ki-67 are of minor value as predictors of recurrence of benign meningiomas.
authors.affiliation: Department of Pathology, Glostrup Hospital, Denmark.
authors.forename: M L
authors.initials: ML
authors.lastname: Møller
authors.forename: O
authors.initials: O
authors.lastname: Braendstrup
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000032:analysis*; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis / Q000276:immunology*; D008579:Meningioma / Q000175:diagnosis / Q000276:immunology*; D009364:Neoplasm Recurrence, Local / Q000276:immunology*; D011237:Predictive Value of Tests; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis*
chemical_list: D019394:Ki-67 Antigen; D018809:Proliferating Cell Nuclear Antigen