Co-expression network of esophageal squamous cell carcinoma. (A) Pearson correlation of DE-lncRNAs and DE-coding genes. (B) Co-expression of esophageal squamous cell carcinoma has been performed after differential expression analysis involving tumor (n = 4) against normal tissue (n = 4). Resulting clusters were nested to clear the visualization. The nests were numbered from Nt 1 to Nt7. Link width represents number of interactions among clusters. Red nodes represent increased transcription comparing to control and blue nodes represent decreased transcription comparing to control. Circles represents coding RNA and squares represents long non-coding RNA. Dashed lines enclosing clusters of co-expressed genes. Long non-coding RNAs are numbered and the respective annotation is present on the bottom of the figure. For the coding RNA annotation, please see Additional file 2: Figure S1.