KITLG and neoplasm: The frequent downregulation of FBXW7 in human LSCC (Ruiz et al., 2019; Figure 1—figure supplement 2B) may underlie the increased accumulation of SCF(Fbw7) substrate proteins like c-MYC, c-JUN, and ΔP63 in LSCC, and thereby cause LSCC tumours to be increasingly dependent on USP28 function.