RPS6 and pneumocystosis: The genes RPL5 and RPS6, encoding ribosomal proteins, are, after GLTSCR2, the most significantly down regulated genes when comparing all Pure DCIS samples with all normal ductal tissue, (FC; 1.3e-66 and 1.1e-57 respectively), and both genes were also among the most significant DEGs when comparing samples from very early in the PCP continuum.