NCAM1 and myxoma: Moreover, myxoma tissues contain a distinct subset of mucosal-associated invariant T (MAIT) cells, which may be associated with antibacterial host defense.47,48 NK cells encompassed two subsets including CD16 + NK and CD56 + NK, where CD16 + NK cells predominate in normal cardiac tissues, and CD56 + NK cells are the principal subset in myxoma tissues.