MUC5AC and neoplasm: Conversely, high stroma-to-neoplasia ratio (HR = 0.38; p = 0.002), presence of dispersion (HR = 0.44; p = 0.006), diffuse regressive changes (HR = 0.39; p = 0.013), and presence of mucin (HR = 0.35; p = 0.047) were positive prognostic factors.