MERTK and neoplasm: Indeed, recent studies provide an elegant example of this paradigm, whereby the massive apoptosis associated with post-partum mammary involution was associated with PS/Mertk-mediated efferocytosis and the production of “wound-healing” cytokines, including IL-4, IL-10, and TGF-β that induced epithelial to mesenchymal transition and metastasis of resident tumor cells [102].