For IHC, investigating the expression patterns of MUC5AC detected by various Mabs (CLH1, 45M1, 21M1, NPC-1C, and PAM4) in PDA, associating it with the outcomes, and stratifying the data based on the stage of diagnosis, histology, differentiation, and thresholds for cut-offs might give us a better picture of its significance. Here, MUC5AC is linked to Patent ductus arteriosus.