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- W2589726725 abstract "540 Background: Thrombocytosis has been identified as a prognostic factor in many cancer types including ovarian, breast, and lung cancers. In colorectal cancer (CRC), the literature is divided. Several smaller case studies suggest a negative prognosis in CRC patients with pre-operative thrombocytosis, a larger population study contradicts this. Methods: We performed a retrospective chart review of CRC patients treated at the Cancer Center of Southeastern Ontario diagnosed from January 2005 to December 2011. 1304 confirmed CRC patient charts were identified and patient, tumor, blood work and treatment variables were extracted. Results: 1,096 patients had platelet count available at the time of oncology consult. 222 (20.3%) were characterized as having thrombocytosis (>400x10 9 /L). No difference was identified between those with normal and with thrombocytosis with regards to age, sex, comorbidities, and BMI. However, a statistically significant difference was identified when looking at several pathological characteristics. Significantly more patients with thrombocytosis presented with stage 4 disease (p<0.0001). Additionally less early T-stage (T1: p<0.05, T2: p<0.001), lymph node positivity (p<0.05) and LVI (p<0.05) was identified. Univariate analysis identified a significant difference in survival (1yr: 71.6% vs 88.1%, p<0.0001; 2 yr: 58.1% vs 78.1%, p<0.0001; 5yr: 48.2% vs 64.7%, p<0.0001). Multivariate Cox regression analysis, identified a statistically significant effect of thrombocytosis on risk of dying (HR=1.434, C.I 1.153-1.784, p=0.001). A survival difference was primarily identified in the Stage 4 population (1yr: 55.8% with thrombocytosis vs 72.9% with normal platelet count, p=0.0058; 2 yr: 36.0% vs 50.2%, p=0.0388; 5yr: 26.7% vs 32.0%, p=0.4042). There were no differences in the number of metastatic sites or the number of days on chemotherapy to account for the survival difference. Conclusions: Thrombocytosis, at the time of oncology consultation appears to predict a lower chance of survival in CRC patients, especially in the stage 4 population. Further work is required to elucidate the mechanism of action between elevated platelet counts and survival." @default.
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- W2589726725 date "2016-02-01" @default.
- W2589726725 modified "2023-09-25" @default.
- W2589726725 title "Thrombocytosis as a predictor of poor prognosis in colorectal cancer patients." @default.
- W2589726725 doi "https://doi.org/10.1200/jco.2016.34.4_suppl.540" @default.
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