ERBB2 and triple-negative breast carcinoma: The expression level of tRF-Arg-CCT-017 in HER-2 subtype was significantly higher than that in other subtypes, and the expression levels of tRF-Gly-CCC-001 and tiRNA-Phe-GAA-003 were different between Luminal and triple-negative breast cancer (TNBC), reflecting obvious heterogeneity.