High expression of MUC5AC showed a trend toward improved PFS (HR 0.44, 95 % CI 0.18–1.07, p = 0.07), while no association of MMR deficiency with PFS was observed (HR 1.04, 95 % CI 0.49–2.23, p = 0.92). The gene discussed is MUC5AC; the disease is hyperinsulinemic hypoglycemia, familial, 4.