The GGT activity was increased for all breast cancer subtypes, but to a greater extent for the hormone receptor positive subtypes: luminal A (+13.2%, p < 0.0001), luminal B(−) (+11.8%, p < 0.0001), and luminal B(+) (+12.3%, p < 0.0001). The gene discussed is NR4A1; the disease is breast carcinoma.