OBJECTIVETo explore the value of of CD, MPO, Ki-67, C-MYC positive rates in the pathological tissues and C-MYC gene of patients with T-LBL/ALL for predicting Prognosis.

METHODSNinty cases of T-LBL/ALL patients in our hospital were selected and included in the T-LBL/ALL group, and 30 cases of lymphnode reactive hyperplasia were selected as control group. Immunohistochemical staining was used to detect the changes of CD, MPO, Ki-67 and C-MYC positive rate in 2 groups, and the changes of C-MYC gene were detected by fluorescence in situ hybridization.

RESULTSIn 90 patients with T-LBL/ALL, there were CD1a34 cases (37.8%), CD367 cases (74.4%), epsilon CD347 cases (52.2%), CD785 cases (94.4%), CD1033 cases (36.7%), CD3422 cases (24.4%), CD4348 cases (53.3%), CD45RO46 cases (51.1%), CD9988 cases (97.8%), TDT85 cases (94.4%); and CD23, CD20, and MPO all were negative; Ki-67>80% 47 cases (52.2% cases), Ki-67≤80%, 43 cases (47.8%). In 90 T-LBL/ALL patients, the positive rate of C-MYC (66.7%) was significantly higher than the control group (positive rate 0.0%) (P< 0.05); the Ki-67 index, mediastinal widening of T-LBL/ALL patients and the positive rate of C-MYC positively were correlated (P< 0.05). The overall survival rate (44.0%) of C-MYC negative patients was significantly higher than that of C-MYC positive patients (0.0%). The overall survival rate of C-MYC negative patients was significantly higher than that of C-MYC positive patients (P< 0.05).Ann Arbor staging, LDH, bone marrow involvement, mediastinal widening, Ki-67 positive index, and C-MYC protein expression of patients with T-LBL/ALL did not correlated with increased C-MYC gene breakage and copy number (P> 0.05).

CONCLUSIONThe overall survival rate of C-MYC positive patients decreases, which positively correlates with Ki-67 positive index and mediastinal width, suggesting that the prognosis of the patients with C-MYC protein expression is poorer.