Examples of various myeloid and monocytic aberrant antigenic patterns in MDS. (A) Abnormal retention of HLA-DR in subpopulations of maturing myeloid cells. (B) Abnormal development in a subpopulation of monocytes that lack CD11b. (C) An abnormal “convex” rather than “concave” relationship between CD13 and CD16. (D) Aberrant lack of maturation to CD16. (E-F) CD56 expression on a subpopulation of myeloid cells and a population of monocytes with bright abnormal CD56 expression. (G-H) Abnormal, dim CD34 expression on maturing myeloid cells and monocytes. (I-J) Presence of CD7 on maturing myeloid cells and monocytes.