SLC7A7 and lung carcinoma: However, the poor prognosis for lung cancer (OS: HR = 2.62, 95% CI 1.25–5.49, P = 0.0107; RFS: HR = 2.06, 95% CI 1.18–3.59, P = 0.0111) was correlated with higher SLC7A7 expression (Fig. 3g, h).