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Developmental biology in the context of oncology involves the study of how normal cellular development and differentiation become altered during cancer progression. It encompasses investigating the genetic and epigenetic changes that drive malignant transformation, as well as understanding how these alterations impact the behavior of cancer cells, including their ability to proliferate, migrate, and evade immune surveillance. This field also explores the role of developmental signaling pathways in cancer, such as Wnt, Notch, and Hedgehog, which are often dysregulated in tumors. By elucidating the mechanisms underlying cancer development and progression, research in this area has the potential to inform the design of novel therapeutic strategies and improve patient outcomes.