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Abstract
In patients (pts) with non-Hodgkin's lymphoma (NHL) under 25 years, treatment with MCP-842 protocol, a short duration intense protocol, yields worse survival in pts with lymphoblastic lymphoma (LL) compared to other high grade lymphomas. In order to identify both favourable and unfavourable subgroups in pts with T-cell LL (T-LL) with respect to relapse free survival following treatment with MCP-842 protocol, we analysed the expression of p53 and bcl-2 proteins in 22 pts with T-LL treated at the Tata Memorial Hospital, Mumbai by immunohistochemistry. p53 protein overexpression was noted in 59% cases and bcl-2 overexpression was noted in 29.4% cases. p53 expression correlated with a higher rate of relapse (p =0.03 ; RR 7.9). The 5-year relapse free survival (RFS) was better in p53 negative patients compared to positive patients (70 vs 38%) (log-rank ρ = 0.04). In conclusion, in this study, overexpression of p53 protein was common in patients with T-LL. T-LL pts negative for p53 are likely to benefit from the short intense protocol--MCL-842. Bcl-2 protein overexpression was not a prognostic factor in these patients.