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American Journal of Pathology, Vol 121, 369-373, Copyright © 1985 by American Society for Investigative Pathology

REGULAR ARTICLES

Frequent immunoglobulin and T-cell receptor gene rearrangements in "histiocytic" neoplasms

LM Weiss, MJ Trela, ML Cleary, RR Turner, RA Warnke and J Sklar

The authors have analyzed the DNA of immunoglobulin and T-cell receptor genes in a series of 6 malignancies which were judged to be of histiocytic derivation on the basis of morphologic criteria. They found that 4 of these cases showed rearrangements of the beta T-cell receptor genes in spite of the lack of any specific immunohistochemical markers for B or T cells. One case showed rearrangements of both heavy and light chain immunoglobulin genes and probably represents either a sinusoidal large cell lymphoma or a B-cell lymphoma with activation of histiocytes simulating malignant histiocytosis. A single case lacked both immunoglobulin and T-cell receptor rearrangements consistent with immunologic analyses that suggested its origin from an interdigitating reticulum cell. The result of this study in conjunction with the authors' previous immunologic observations suggests that many presumed histiocytic malignancies actually represent T-cell lymphomas. Alternatively, beta T-cell receptor rearrangement may be a common feature of tumors that show monocyte/histiocytic differentiation.


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Copyright © 1985 by the American Society for Investigative Pathology.