Expression of UCA1 in esophageal cancer tissues. (A, B) Expressions of candidate lncRNAs in esophageal cancer tissues (Tumor) and paired normal tissues (Control) (n=15). (C) Morphology and size of exosomes derived from the plasma of patients with esophageal cancer (Tumor) or control subjects (Control). Scale bar = 200 nm. (D) Protein expressions of exosomal markers TSG101 and CD63 in exosomes derived from the plasma of patients with esophageal cancer (Tumor) or control subjects (Control). (*) denotes the difference between groups (P<0.05). Each experiment had a minimum of three replicates per treatment group.