PITPNA and small cell lung carcinoma: Among the SCLC patients with high lncRNA PITPNA-AS1 levels, the proportions of patients with lymph node metastasis and distant metastasis were 90.9% and 54.5%, respectively, while the proportions of patients with low lncRNA PITPNA-AS1 levels were decreased, at 50.0% and 9.1%.