ALK and anaplastic large cell lymphoma: The roles of miR-146 and miR-155 are less clear, although miR-146 is known to play a role in cytokine signalling [70], while miR-155 is known to affect various physiological functions, including development of the haematopoietic lineage, differentiation, immunity and inflammation, which have been described in ALK- ALCL immune cell models [65,71].