(A) An ethylenediaminetetraacetic acid (EDTA) blood film 0 min after venipuncture shows agranular platelets (also called gray platelets) (arrow) partly aggregated (arrowhead) and normal platelets (×400, Wright-Giemsa stain). (B) An EDTA blood film 30 min after venipuncture shows middle-sized, aggregated agranular platelets (arrowhead) (×400, Wright-Giemsa stain). (C) An EDTA blood film 120 min after venipuncture shows giant, aggregated agranular platelets (arrowhead) (×400, Wright-Giemsa stain). (D) An EDTA blood film 120 min after venipuncture shows normal platelets, approximately 2 months after discharge (×400, Wright-Giemsa stain).