Abstract
The prognosis of chordomas is difficult to predict based solely on histological findings. The purpose of this study was to assess the immunohistochemical expression of the proliferation marker Ki-67 antigen and the expression of p53 in skull base chordomas and to relate their expressions to the outcome. We examined the expression of p53 and the MIB-1 labeling index (LI), assessed by Ki-67 expression, in 19 tumors (initial, n = 11; recurrent, n = 8) from 11 patients. The correlation among the MIB-1 LI, p53 expression, and the clinical outcome was analyzed. The mean MIB-1 LI and p53 expression at the initial surgery were 5.6 ± 4.6% and 9.0 ± 9.4%, respectively. At the time of recurrence, the mean MIB-1 LI and p53 expression were 10.2 ± 7.4% and 16.5 ± 12.0%. The correlation between the MIB-1 LI and p53 expression at the initial and recurrent surgeries was highly significant (r = 0.948; P < 0.0001). The change in p53 expression from the initial to the recurrent chordomas was significantly greater in patients who died of tumor-related causes than in the surviving patients. In the surviving patients, the values for MIB-1 LI and p53 expression in the recurrent tumors were significantly higher in the disease-ongoing group than in the disease-free group. Our results suggest that determination of the immunohistochemical expression of p53 and Ki-67 antigen is helpful to predict tumor recurrence and prognosis in skull base chordomas.
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Sakai, K., Hongo, K., Tanaka, Y. et al. Analysis of immunohistochemical expression of p53 and the proliferation marker Ki-67 antigen in skull base chordomas: relationships between their expression and prognosis. Brain Tumor Pathol 24, 57–62 (2007). https://doi.org/10.1007/s10014-007-0222-4
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DOI: https://doi.org/10.1007/s10014-007-0222-4