THE PROGNOSTIC SIGNIFICANCE OF P16, KI-67, P63, AND CK17 EXPRESSION DETERMINED BY IMMUNOHISTOCHEMICAL STAINING IN CERVICAL INTRAEPITHELIAL NEOPLASIA 1
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Objective To evaluate the prognostic signifi cance of p16, Ki-67, p63, and cytokeratin (CK) 17 expression determined by immunohistochemical staining in cervical intraepithelial neoplasia (CIN) 1. Methods Biopsy tissue samples from 33 patients diagnosed with CIN 1 were stained immunohistochemically for p16, Ki-67, p63, and CK17. The staining results were correlated with the clinical course of the disease. Results Seventeen of 18 (94.4%) p16-negative patients experienced regression, and only 1 patient (5.6%) developed persistent disease. Fifteen of the 16 (93.8%) Ki-67-negative patients experienced regression, and 1 patient (6.3%) developed persistent disease. Negative p16 and Ki-67 expression correlated signifi cantly with disease regression (P =0.004 and P =0.017, respectively). Fourteen of 15 (93.3%) patients negative for both p16 and Ki-67 experienced regression, and 1 patient negative for both p16 and Ki-67 (6.7%)developed persistent disease. The expression levels of p63 and CK17 were not signifi cantly associated with disease regression or persistence (P =0.149 and P =0.642, respectively). Ten of the 13 (76.9%) p16-positive patients had a high-risk HPV infection. Highrisk HPV infection was signifi cantly associated with p16 expression (P =0.049). Conclusion CIN 1 with p16- or Ki-67-negative immunohistochemical staining was associated with spontaneous disease regression. The p63and CK17 expression patterns were not related to the behavior of CIN 1.
Abstract
Objective To evaluate the prognostic signifi cance of p16, Ki-67, p63, and cytokeratin (CK) 17 expression determined by immunohistochemical staining in cervical intraepithelial neoplasia (CIN) 1. Methods Biopsy tissue samples from 33 patients diagnosed with CIN 1 were stained immunohistochemically for p16, Ki-67, p63, and CK17. The staining results were correlated with the clinical course of the disease. Results Seventeen of 18 (94.4%) p16-negative patients experienced regression, and only 1 patient (5.6%) developed persistent disease. Fifteen of the 16 (93.8%) Ki-67-negative patients experienced regression, and 1 patient (6.3%) developed persistent disease. Negative p16 and Ki-67 expression correlated signifi cantly with disease regression (P =0.004 and P =0.017, respectively). Fourteen of 15 (93.3%) patients negative for both p16 and Ki-67 experienced regression, and 1 patient negative for both p16 and Ki-67 (6.7%)developed persistent disease. The expression levels of p63 and CK17 were not signifi cantly associated with disease regression or persistence (P =0.149 and P =0.642, respectively). Ten of the 13 (76.9%) p16-positive patients had a high-risk HPV infection. Highrisk HPV infection was signifi cantly associated with p16 expression (P =0.049). Conclusion CIN 1 with p16- or Ki-67-negative immunohistochemical staining was associated with spontaneous disease regression. The p63and CK17 expression patterns were not related to the behavior of CIN 1.
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