title: T-lymphoblastic lymphoma terminating as malignant histiocytosis with rearrangement of immunoglobulin heavy chain gene.
abstract: A 19-year-old man presented with cutaneous, mediastinal and intrapleural localization of a T-lymphoblastic non-Hodgkin's lymphoma (NHL) of immature phenotype. Two weeks after mediastinal irradiation the T-lymphoblasts had disappeared from the pleural effusion, but a clonal monocytic cell population was detected, as documented by immunological marker analysis and the presence of t(10;11), a cytogenetic aberration often associated with monocytic malignancies. Intensive chemotherapy induced a complete remission of the T-lymphoblastic NHL. However, the patient died from massive infiltration of lympho-hemopoietic tissue by cells with the morphology and immunological phenotype of macrophages. Southern blot analysis revealed the presence of a clonally rearranged immunoglobulin heavy chain (lgH) gene in tumorous tissue obtained at autopsy. The same clonally rearranged lgH was detectable in the post-irradiation pleural fluid 2 weeks after initial diagnosis. The observed germline configuration of T-cell receptor beta-genes and both lg light chain genes in this monoclonal proliferation provides additional evidence for the true histiocytic nature of the fatal disease. Therefore we conclude that a true histiocytic NHL with one rearranged lgH gene was most probably already present at initial diagnosis when the patient presented with the T-lymphoblastic NHL and that this true histiocytic NHL further developed despite the cytostatic treatment.
authors.affiliation: Department of Pathology, Erasmus University, Rotterdam, The Netherlands.
authors.forename: T H
authors.initials: TH
authors.lastname: van der Kwast
authors.forename: J J
authors.initials: JJ
authors.lastname: van Dongen
authors.forename: J J
authors.initials: JJ
authors.lastname: Michiels
authors.forename: H
authors.initials: H
authors.lastname: Hooijkaas
authors.forename: M C
authors.initials: MC
authors.lastname: Kappers
authors.forename: A
authors.initials: A
authors.lastname: Hagemeijer
mesh_terms: D000328:Adult; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D017252:CD3 Complex; D002869:Chromosome Aberrations; D004273:DNA, Neoplasm / Q000032:analysis; D015321:Gene Rearrangement; D005803:Genes, Immunoglobulin; D054747:Histiocytic Sarcoma / Q000209:etiology*; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000150:complications* / Q000235:genetics / Q000276:immunology; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications* / Q000235:genetics / Q000276:immunology; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000150:complications* / Q000235:genetics / Q000276:immunology; D011948:Receptors, Antigen, T-Cell / Q000032:analysis; D012878:Skin Neoplasms / Q000150:complications* / Q000235:genetics / Q000276:immunology
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D004273:DNA, Neoplasm; D011948:Receptors, Antigen, T-Cell