PMID: 6969026Jan 1, 1980Paper

Dysgranulopoietic neutropenia and abnormal monocytes in childhood vitamin B12 deficiency

American Journal of Hematology
W M CristA Malluh

Abstract

Neutropenia and/or leukopenia (associated with elevated serum lysozyme levels) in three children with vitamin B12 deficiency were evaluated using soft agar culture and ultrastructural and cytochemical techniques. In two patients a marked increase in peripheral myeloid colony forming cells (CFC) was observed; whereas a marginal increase in CFC was present in the third, less symptomatic, patient. Marrow CFC was normal or slightly increased. Serum colony stimulating activity (CSA) was normal but elaboration of CSA by white blood cells was low. Normal maturation of the progenitors was present in vitro and serum inhibitors of myelopoiesis were absent. Megaloblastic neutrophils and monocytes with nuclear-cytoplasmic asynchrony were observed ultrastructurally in directly sampled marrow specimens. These cells contained autophagic and/or heterophagic vacuoles and an increase in cytoplasmic granules. Both monocytes and neutrophils also contained enlarged-disrupted centrioles. Many marrow macrophages contained phagocytic vacuoles, which enclosed disrupted neutrophils and cellular debris.

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Citations

Feb 1, 1981·The Journal of Pediatrics·R T ParmleyH Findley
Jun 1, 1996·Blood Reviews·E L Sievers, D C Dale
Nov 23, 2006·Journal of Pediatric Hematology/oncology·Arnon BroidesJacov Levy
Oct 1, 1993·Acta Paediatrica·J RajantieL Hovi
Jan 1, 1983·British Journal of Haematology·K KätkäW H Hitzig
Jan 1, 1985·American Journal of Hematology·A L LightseyL A Boxer

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