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Association of Serum YKL-40 Level with Tumor Burden and Metastatic Stage of Prostate Cancer

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Author(s): Enver Ozdemir | Tarık Cicek | Mehmet Onur Kaya

Journal: Urology Journal
ISSN 1735-1308

Volume: 9;
Issue: 3;
Start page: 568;
Date: 2012;
Original page

Keywords: prostatic neoplasms | tumor marker | tumor burden | prostate-specific antigen

ABSTRACT
PURPOSE: To investigate the relationship between serum level of YKL-40 and Gleason score, grade and stage of the disease, and for the first time, with tumor burden in patients with prostate cancer (PCa). MATERIALS AND METHODS: Serum levels of YKL-40 and prostate-specific antigen were measured in 34 men (mean age: 66 years) with newly diagnosed and untreated PCa, in 34 men (mean age: 65 years) with biopsy proven benign prostatic hyperplasia, and in 29 healthy young men (mean age: 24 years). RESULTS: Serum YKL-40 concentration in men with PCa and benign prostatic hyperplasia, and in controls were 165.67 ± 107.84 ng/mL, 137.38 ± 82.04 ng/mL, and 69.69 ± 18.46 ng/mL, respectively. Serum level of YKL-40 was correlated with tumor burden in 30.4% of the patients with PCa (P = .04). A cut-off serum YKL-40 value of 92.696 ng/mL produced 70.6% sensitivity and 93.1% specificity. Elevated serum level of YKL-40 was strongly associated only with metastatic stage of the PCa. No association was observed between elevated level of YKL-40 and Gleason score groups or Gleason grade. CONCLUSION: Our results suggest that elevated serum level of YKL-40 may be a useful indicator of tumor burden and metastatic stage of PCa. Further studies are warranted to better elucidate the meaning of YKL-40 in tumor burden and invasiveness.
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