LTA4H and laryngeal squamous cell carcinoma: In order to explore the relationship between LTA4H and laryngeal squamous cell carcinoma (LSCC), or more broadly head and neck squamous cell carcinoma (HNSCC), we first studied the expression level of LTA4H in LSCC tissues and normal tissues through The Cancer Genome Atlas (TCGA) database (Fig. 1A).