Background: To explore possible correlation between serum lactate dehydrogenase (SLDH) levels and gastric cancer.
Materials and methods: We retrospectively reviewed 365 patients with gastric cancer. The correlation of SLDH levels with clinicopathologic features and survival rate was studied.
Results: SLDH levels were closely associated with the pathological (p) T stage (P = 0.011), metastasis (P = 0.012), pTNM stage (P = 0.001), and recurrence (P = 0.012). Moreover, we found a significant SLDH level difference among Borrmann type (P = 0.027), pT stage (P = 0.004), lymph node metastasis (P = 0.027), metastasis (P < 0.001), pTNM stage (P = 0.006), and recurrence (P = 0.002). In addition, we detected a significant SLDH level difference between alive and dead subgroups (P = 0.001). In addition, both univariate analysis and multivariate analysis showed that high SLDH levels were independent prognostic factor. For the subgroup with normal LDH (median point of 157.0 U/L), we detected that the subset with SLDH levels ≥157 U/L (158-245 U/L) showed poorer OS (P = 0.005) and DFS (P = 0.01) than that of ≤157 subgroup.
Conclusions: Our results suggest that high SLDH level could be an independent poor prognostic biomarker. Gastric cancer patients with relative high SLDH level (158-245 U/L) were prone to develop a shorter OS and DFS.