NR4A1 and cancer: When we separated the hormone receptor positive patients in luminal A (n = 224) and luminal B (n = 55) we failed to detect any significant impact of IGKC on DFS (Log-rank test: P = 0.591; Fig. 4A) and OS (Log-rank test: P = 0.183; Fig. 4B) in luminal A type cancer.