Low pre-operative levels of serum albumin predict lymph node metastases and ultimately correlate with a biochemical recurrence of prostate cancer in radical prostatectomy patients

Introduction. To date, only few studies focusing on the issue of host general and immune activity have been performed in localized prostate cancer (PCa). The aim of this study was to elucidate potent non tumor-related biomarkers that express aggressiveness of PCa treated by radical prostatectomy (RP). Materials and methods. Data from 179 patients who underwent RP were analyzed. The correlations between various kinds of non tumor- related factors in addition to tumor- related factors and biochemical recurrence (BCR) were analyzed. The correlations between pre-, intra- and post-operative factors were also analyzed. Results. Thirty-two cases (17.9%) had a BCR. The factors found to be significantly predictive of BCR using a Cox-proportional hazard model were the pre- operative serum prostate specific antigen (PSA) level and the existence of pathological lymph node metastasis (LNM). A low pre- operative serum albumin level (<4.0 g/dl) was significantly correlated with BCR univariately. Logistic regression analysis revealed that a low pre- operative serum albumin level, an American Society of Anesthesiologists (ASA) score above class 2, and a Gleason score above 8 in the biopsy specimens were significantly predictive of pathological LNM. Conclusions. Tumor-related characteristics are more important for predicting BCR. However, our results suggest that low pre- operative serum albumin level may indicate extensive disease of clinically localized PCa and may ultimately be correlated with BCR. Although multiple reasons may account for the significance of the serum albumin level, it is noteworthy that delayed diagnostic and therapeutic procedures in comorbid patients with low serum albumin levels may lead to PCa progression.