Volume 14, Issue 1 pp. 79-87
Case Report
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Paroxysmal nocturnal hemoglobinuria terminating in TdT-positive acute leukemia

Jun'Ichi Katahira MD

Corresponding Author

Jun'Ichi Katahira MD

Division of Hematology, Department of Internal Medicine, Tokyo Women's Medical College, Tokyo, Japan

Division of Hematology, Department of Internal Medicine, Tokyo Women's Medical Coliege, 10 Ichigaya-Kawadacho, Shinjuku-ku, Tokyo, JapanSearch for more papers by this author
Masako Aoyama

Masako Aoyama

Division of Hematology, Department of Internal Medicine, Tokyo Women's Medical College, Tokyo, Japan

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Kazuo Oshimi

Kazuo Oshimi

Division of Hematology, Department of Internal Medicine, Tokyo Women's Medical College, Tokyo, Japan

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Hideaki Mizoguchi

Hideaki Mizoguchi

Division of Hematology, Department of Internal Medicine, Tokyo Women's Medical College, Tokyo, Japan

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Michiko Okada

Michiko Okada

Department of Anatomy, Tokyo Women's Medical College, Tokyo, Japan

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First published: February 1983
Citations: 14

Abstract

A case of paroxysmal nocturnal hemoglobinuria (PNH) which developed terminal transfer-ase (TdT)-positive leukemia 5 years after the diagnosis of PNH was studied. Most of the leu-kemic cells were suggestively lymphoid by cytochemistry and electron microscopy, and TdT-positive by immunofluorescence studies. The development of acute lymphoblastic leukemia during the course of PNH suggests that in PNH the clonal abnormality may involve lymphoid cells as well as myeloid cells, thus raising the possibility of the disease being a disorder of the pluripotential stem cell.

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