Abstract:
AIMS:To evaluate the use of the Wilms' tumour gene (WT1) marker and histomorphological parameters as indicators of prognosis in malignant peritoneal mesothelioma (MPM). METHODS AND RESULTS:Histological samples of 31 MPM were stained immunohistochemically for the WT1 protein. The results were quantified by recording the number of stained nuclei, and then correlated with patient survival. Statistical correlation was evaluated for tumour histotype, mitotic count (MC), nuclear grade (NG), necrosis, lymphoid response (grade of inflammation) and desmoplasia with regard to survival. High-grade histology (solid epithelioid, pure sarcomatoid or biphasic tumours), high NG, MC more than five per 10 per high-power field (HPF), necrosis and desmoplasia were associated with a significantly worse prognosis. Patients with MPM with low WT1 expression (≤25% of positive cells) survived for a significantly shorter time compared to those with high WT1 expression (>25% of positive cells) (P = 0.0001). The 50% survival time of subjects with low WT1 expression was 2.9 months [95% confidence interval (CI): 2.05-3.71] versus 31.5 months (95% CI: 20.4-42.5) for those with high WT1 expression. On multivariate analysis, WT1 and MC were found to be associated independently with survival (P = 0.002; P = 0.005, respectively). CONCLUSIONS:Our study suggests that low WT1 expression and high MC may be indicative of an unfavourable prognosis in patients with advanced malignant peritoneal mesothelioma.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Scattone A,Serio G,Marzullo A,Nazzaro P,Corsi F,Cocca MP,Mattoni M,Punzi A,Gentile M,Buonadonna AL,Pennella Adoi
10.1111/j.1365-2559.2011.04108.xsubject
Has Abstractpub_date
2012-02-01 00:00:00pages
472-81issue
3eissn
0309-0167issn
1365-2559journal_volume
60pub_type
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