AHI1 and primary cutaneous T-cell non-Hodgkin lymphoma: Abelson helper integration site 1 (AHI1) is regulated at multiple stages of hematopoiesis, with significant dysregulation observed across various human leukemic cell lines, most notably in cutaneous T-cell lymphoma (CTCL) cell lines, where AHI1 transcript levels are elevated by up to 40-fold [74,75].