title: Cyclic neutropenia as a premalignant manifestation of acute lymphoblastic leukemia.
abstract: A 20-year-old female from the Philippines developed anemia and granulocytopenia. With androgen therapy, her anemia improved but she continued to show a pattern of fluctuating neutropenia consistent with human cyclic neutropenia: Blood neutrophil oscillation was regular with a periodicity of 21 days. She developed recurrent pharyngitis and apthous stomatitis but there was no cycling of other blood elements. Bone marrow aspiration and biopsy showed normal developing myeloid cells, a clonal chromosomal abnormality, and myelofibrosis. During the fourth documented cycle, blasts appeared and complete lymphoblastic transformation ensued. Blast cells were CALLA positive, Ia positive, and contained intranuclear TdT; they were negative for E, EAC, and EA rosettes. She was treated for non-T, non-B CALLA-positive ALL and within 6 weeks was in a remission without evidence of cycling neutrophil counts. This young woman's case suggests that cyclic neutropenia may represent a previously unrecognized premalignant state associated with acute lymphoblastic leukemia.
authors.forename: D B
authors.initials: DB
authors.lastname: Lensink
authors.forename: A
authors.initials: A
authors.lastname: Barton
authors.forename: F R
authors.initials: FR
authors.lastname: Appelbaum
authors.forename: W P
authors.initials: WP
authors.lastname: Hammond
mesh_terms: D000328:Adult; D000380:Agranulocytosis / Q000150:complications*; D001706:Biopsy; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D006801:Humans; D007945:Leukemia, Lymphoid / Q000209:etiology*; D009503:Neutropenia / Q000150:complications* / Q000276:immunology / Q000503:physiopathology