As shown in Figure 3e–i, the mesenchymal cell markers (N‐cadherin, Vimentin, MMP7, Snail, Twist, MMP2, and MMP9) were higher and the epithelial marker E‐cadherin was lower after treatment with macrophages treated with IH exosomes compared to the macrophages treated with RA exosomes or macrophages treated with PBS. Here, MMP9 is linked to isolated hemihyperplasia.