IL6 and adenocarcinoma: Interestingly, all analysed interleukins taken from tumour samples demonstrated upregulated expression in the squamous cell subtype compared to adenocarcinoma: IL-17: 0.135 (IQR: 0.043–0.212) vs. 0.018 (IQR: 0.012–0.143), (UMW test, p = 0.032); IL-1β: 9.302 (IQR: 3.839–16.335) vs. 3.831 (IQR: 1.095–12.565); IL-6: 1.608 (IQR: 0.455–4.074) vs 0.604 (IQR: 0.360–1.510).