MUC5AC and neoplasm: In addition to histological lesions reflecting earlier prostatic tumor invasion (Fig 6C1-1’), various pathologies were also shown in tumor samples of the compound mice, including aberrant differentiation (Fig 6C2-2’), transepithelial leukocyte migration (Fig 6C3-3’), and pools of extracellular mucin spilling into the stromal compartment (Fig 6C4-4’).