title: Inflammatory fibrous histiocytoma presenting leukemoid reaction.
abstract: 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.
authors.affiliation: Second Department of Pathology, Kumamoto University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: M
authors.initials: M
authors.lastname: Naito
authors.forename: T
authors.initials: T
authors.lastname: Yoshimura
authors.forename: H
authors.initials: H
authors.lastname: Uchida
authors.forename: S
authors.initials: S
authors.lastname: Araki
mesh_terms: D000368:Aged; D002630:Chemotactic Factors / Q000378:metabolism; D003937:Diagnosis, Differential; D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007120:Immunochemistry; D007955:Leukemoid Reaction / Q000175:diagnosis*; D007958:Leukocyte Count / Q000187:drug effects; D008297:Male; D008854:Microscopy, Electron; D012782:Shoulder; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000378:metabolism / Q000473:pathology; D014020:Tissue Extracts / Q000494:pharmacology
chemical_list: D002630:Chemotactic Factors; D014020:Tissue Extracts