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. 2012 Mar 27:4:9.
doi: 10.1186/1758-3284-4-9.

The prognostic significance of p63 and Ki-67 expression in myoepithelial carcinoma

You-Hua Jiang  1 , Bo Cheng, Ming-Hua Ge, Gu Zhang
Affiliations

The prognostic significance of p63 and Ki-67 expression in myoepithelial carcinoma

You-Hua Jiang et al. Head Neck Oncol. .

Expression of concern in

  • Comment: Head and Neck Oncology.
    BioMed Central. BioMed Central. BMC Med. 2014 Feb 5;12:24. doi: 10.1186/1741-7015-12-24. BMC Med. 2014. PMID: 24499430 Free PMC article. Review.

Abstract

Background: Myoepithelial carcinoma is a rare tumour. The clinical and biological behaviours of these tumours are variable. Although many factors have been evaluated as potential prognostic indicators, including clinical stage, site and size of the tumour, high proliferative activity, extensive invasion into the surrounding tissue, perineural permeation, the abnormal presence of nuclear DNA content, and marked cellular pleomorphism, there are no definite histological features that clearly correlate with their behaviour. Thus, conclusions regarding prognostic factors and ideal treatment may emerge as the number of investigated myoepithelial carcinoma cases accumulate.

Methods: Using immunohistochemistry, expression levels of p63 and Ki-67 were determined in 16 myoepithelial carcinoma samples and correlated with clinicopathological characteristics and patient prognosis.

Results: p63 expression was detected in six of the myoepithelial carcinoma tissues (37.5%) and Ki-67 was detected in five (31.3%). In addition, p63 and Ki-67 expression levels were associated with myoepithelial carcinoma recurrence and metastasis. All six patients with p63-positive expression died due to disease or cardiovascular disease (mean survival time = 50.5 months), and p63 expression was statistically significant with respect to survival (P = 0.01). Four patients with Ki-67-positive expression died due to disease or cardiovascular disease (mean survival time = 44.0 months); however, there was no statistically significant difference between Ki-67 expression and survival (P = 0.24).

Conclusions: Recurrence and metastasis in myoepithelial carcinomas are more frequent in p63-positive and Ki-67-positive EMCs, and poor prognosis is associated with overexpression of p63.

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Figures

Figure 1
Figure 1
Using the Kaplan-Meier survival curve, the overall survival rates of 16 patients with MEC at 3 years and 5 years were 68% and 45%, respectively (χ2 = 6.49, p = 0.01).
Figure 2
Figure 2
Immunohistochemical analysis showed that expression of S-100 protein (A), GFAP (B), p63 (C) and Ki67 (D) were positive.
Figure 3
Figure 3
P63 expression yielded a statistically significant difference with survival (χ2 = 6.49, p = 0.01).
Figure 4
Figure 4
There was not a statistically significant difference between Ki67 expression and survival (χ2 = 1.38, P = 0.24).
See this image and copyright information in PMC

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