Inflammatory fibrous histiocytoma presenting leukemoid reaction

K. Takahashi, Y. Kimura, M. Naito, Teizo Yoshimura, H. Uchida, S. Araki

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A case of inflammatory fibrous histiocytoma presenting leukemoid reaction is reported. A tumor had developed at the right scapular region 10 years ago and recurred twice with fever and leukocytosis, and finally with leukemoid reaction. Besides the histopathological features typical of malignant fibrous histiocytoma, this tumor showed prominent and diffuse infiltration of neutrophilic leukocytes. Hematologic examination of the bone marrow aspirates disclosed myeloid hyperplasia. Bacteriological examination revealed no pathogenic microorganisms in the tumor tissue. Chemotactic activity of the neutrophilic leukocytes was demonstrated in the extract obtained from the tumor, and subcutaneous injection of the extract into rats induced myeloid hyperplasia in the bone marrow and neutrophil infiltration in the liver and spleen of the animals. These results suggest the possibility of the case as a colony-stimulating factor-producing tumor.

Original languageEnglish
Pages (from-to)498-506
Number of pages9
JournalPathology Research and Practice
Issue number5
Publication statusPublished - 1989
Externally publishedYes


ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

Takahashi, K., Kimura, Y., Naito, M., Yoshimura, T., Uchida, H., & Araki, S. (1989). Inflammatory fibrous histiocytoma presenting leukemoid reaction. Pathology Research and Practice, 184(5), 498-506.