No significant gene expression alterations could be detected in the stromal cells isolated from adenomas compared to the normals, but COL1A2, FADS1, MAL, PRIMA1, SULF1, THBS2, TIMP1 genes’ transcripts showed significant differences (p < 0.05) in logFc values for the tumour versus normal comparison (Fig. 1; Additional file 4: Table S3). This evidence concerns the gene COL1A2 and adenoma.