(A) Typical global bone marrow morphology: rich cellularity with predominant granulopoiesis (G), some erythroblasts (E), and one micromegakaryocyte (MK). (B) Predominant granulopoiesis with some myelocytes (M), very few metamyelocytes (MN), and a high number of mature neutrophils (N). (C) Details of neutrophils: hypersegmented appearance with a thin opening between lobes and chromatin clumps. (D) Examples of micromegakaryocytes. Clinical spectrum and long-term follow-up of 14 cases with G6PC3 mutations from the French Severe Congenital Neutropenia Registry: Desplantes C, Fremond ML, Beaupain B, Harousseau JL, Buzyn A, Pellier I, Roques G, Morville P, Paillard C, Bruneau J, Pinson L, Jeziorski E, Vannier JP, Picard C, Bellanger F, Romero N, de Pontual L, Lapillonne H, Lutz P, Chantelot CB, Donadieu J - Orphanet journal of rare diseases (2014). Not altered. CC.