RPL21 and neoplasm: In the top 10 altered couples for these tumor types, 9 are identical: SNORA13/EBP41L4A-AS1, SNORA27/RPL21, SNORA31/TPT1, SNORA71E/SNHG11, SNORA72/RPL30, SNORD102/RPL21, SNORD12/ZFAS1, SNORD12B/ZFAS1, and SNORD12C/ZFAS1.