Somatic mutations and deletions affecting ribosomal protein genes occur in up to 20% of acute T-cell leukemia (T-ALL) cases, with the most frequent defects affecting RPL10 (also known as uL16; 7.9% of pediatric T-ALL cases) and RPL22 (eL22; 10%) and with rare defects in RPL5 (uL18) and RPL11 (uL5) [1–3]. This evidence concerns the gene RPL5 and acute lymphoblastic leukemia.