HMGCS2 and breast carcinoma: HMGCS2 was expressed in 1 out of 42 TNBCs (2,38%); 18 out of 101 Luminal A (17,8%); 4 out of 17 Luminal B (23,5%) and 11 out of 43 HER2+ (25,5%), in total: 34 out of the 203 non-apocrine breast carcinomas (16,7%) (Figure 6B).