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- W2443281724 abstract "Background Preoperative chemoradiation therapy (PCX) was introduced to improve the outcome of patients with oesophageal cancer (EC), but conflicting results have been released. Some 20-30% of patients show a complete pathological response, however, the perioperative morbidity and mortality is increased. To search for factors indicating response prior to the onset of PCX we investigated the proliferative activity (MIB-1), the expression of vascular endothelial growth factor (VEGF), and the capillary density (CD34) tissue specimens of ECs were available by endoscopy prior to the start of the treatment. Methods Forty-six (MIB-1) and 21 (VEGF, CD34) tissue specimens of ECs were available from 56 patients undergoing pretherapeutic endoscopy, PCX and surgery. Perioperative morbidity was divided into surgery and non-surgery related morbidity. MIB-1, VEGF and CD34 expression were investigated immunohistochemically. Multivariate analysis was carried out to prove independence of investigated variables. Results Postoperative morbidity was noticed in 54 of 56 operated patents. Eight of 56 patients who received PCX died in hospital. Survival was significantly different between the group of complete responders (n=14) and non-responders (n=23; P = 0.0026). None of investigated tumour samples from patients with a complete response (CR) had a proliferation index of less than 45. Tumour samples from patients with a CR showed a VEGF expression of 10.7 compared with 36.58 of tumours with no response (P = 0.035). CD34 expression showed a correlation with VEGF expression. The relation of mean indices of VEGF expression and proliferative activity in tumours from patients with complete, partial or no response was 10. 7:58.8, 18.3:53.8 and 36.6:43.5, respectively. Conclusions According to these results, it may be expected that tumours with a VEGF/MIB-1 ratio of 1:5 or less prior to PCX will respond to this therapy." @default.
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- W2443281724 date "2006-02-01" @default.
- W2443281724 modified "2023-09-26" @default.
- W2443281724 title "Predictive factors in esophageal cancer after neoadjuvant therapy" @default.
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