Abstract
Objective
Platelets have been implicated in cancer metastasis and prognosis. No population-based study has been reported as to whether preoperative platelet count directly predicts metastatic recurrence of colorectal cancer (CRC) patients.
Design
Using a well-characterized cohort of 1,513 surgically resected CRC patients, we assessed the predictive roles of preoperative platelet count in overall survival, overall recurrence, as well as locoregional and distant metastatic recurrences.
Results
Patients with clinically high platelet count (≥400 × 109/L) measured within 1 month before surgery had a significantly unfavorable survival (hazard ratio [HR] = 1.66, 95 % confidence interval [CI] 1.34–2.05, P = 2.6 × 10−6, P log rank = 1.1 × 10−11) and recurrence (HR = 1.90, 1.24–2.93, P = 0.003, P log rank = 0.003). The association of platelet count with recurrence was evident only in patients with metastatic (HR = 2.81, 1.67–4.74, P = 1.1 × 10−4, P log rank = 2.6 × 10−6) but not locoregional recurrence (HR = 0.59, 95 % CI 0.21–1.68, P = 0.325, P log rank = 0.152). The findings were internally validated through bootstrap resampling (P < 0.01 at 98.6 % of resampling). Consistently, platelet count was significantly higher in deceased than living patients (P < 0.0001) and in patients with metastatic recurrence than locoregional (P = 0.004) or nonrecurrent patients (P < 0.0001). Time-dependent modeling indicated that the increased risks for death and metastasis associated with elevated preoperative platelet counts persisted up to 5 years after surgery.
Conclusion
Our data demonstrated that clinically high level of preoperative platelets was an independent predictor of CRC survival and metastasis. As an important component of the routinely tested complete blood count panel, platelet count may be a cost-effective and noninvasive marker for CRC prognosis and a potential intervention target to prevent metastatic recurrence.
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Acknowledgments
The work was supported by National Cancer Institute Grants CA153099, CA152703, and CA162201 and a Research Scholar Award from the V Foundation for Cancer Research.
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The authors declare that they have no conflict of interest.
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Shaogui Wan and Yinzhi Lai contributed equally to this manuscript.
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Wan, S., Lai, Y., Myers, R.E. et al. Preoperative Platelet Count Associates with Survival and Distant Metastasis in Surgically Resected Colorectal Cancer Patients. J Gastrointest Canc 44, 293–304 (2013). https://doi.org/10.1007/s12029-013-9491-9
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DOI: https://doi.org/10.1007/s12029-013-9491-9