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Prognostic Value of Lactate Dehydrogenase in Patients with Melanoma Treated with Pembrolizumab.

INTRODUCTION: Elevated LDH levels have been extensively reported as a biomarker of poorer outcome in patients with melanoma during the chemotherapeutic era. The role of LDH level as a prognostic factor for treatment outcomes in patients with metastatic melanoma treated with immunooncological therapy has also been reported but requires further analysis.

OBJECTIVES: In this study, we aimed to evaluate the prognostic value of lactate dehydrogenase (LDH) among patients with metastatic and unresectable melanoma treated with pembrolizumab in terms of progression-free survival (PFS).

METHODS: The study included 59 patients with unresectable and metastatic melanoma treated with pembrolizumab. A comparison was performed between patients with normal and elevated levels of LDH in terms of PFS, with subgroup analysis.

RESULTS: There was a significant reduction in PFS among patients with elevated levels of LDH compared with patients with normal levels of LDH (NR vs. 5 months; P=0.02). Patients with elevated LDH levels were older (P=0.01), with liver metastasis (P=0.004), and with less frequent CNS deposits (P=0.028).

CONCLUSION: Although novel agents improved outcomes in patients with melanoma, high levels of LDH persist as an independent prognostic biomarker of poor prognosis.

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