ATMDS peripheral blood findings. (A) Peripheral blood smear (hematoxylin-eosin; original magnification, × 400) from ATMDS patient no. 12 (Table 1) demonstrates a typical dimorphic red cell picture with severe hypochromia, microcytosis, and occasional poorly hemoglobinized “ghost cells.” (B) A hemoglobin H preparation (brilliant cresyl blue; original magnification, × 400) from patient no. 4 at time point 1 reveals many classic “golf ball cells” (arrow) with intracellular hemoglobin H inclusions.