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Clonal analysis of three morphologically distinct lymphomas occurring in the same patient.
  1. C McCormick,
  2. E Philp,
  3. J Mansi,
  4. N Livni,
  5. K McCarthy
  1. Department of Histopathology, St George's Hospital Medical School, London.

    Abstract

    AIMS--To determine whether three morphologically distinct lymphomas (mucosa associated lymphoid tissue (MALT) lymphoma, monocytoid B cell lymphoma, and large cell anaplastic lymphoma), which occurred in the same patient, were in fact three morphological variants of the same lymphoproliferative process. METHODS--Previously described methods of clonal analysis using the polymerase chain reaction (PCR) were used to determine the pattern of rearrangements of the immunoglobulin heavy chain gene and the T cell receptor beta and T cell receptor gamma chain genes in the three lymphomas. RESULTS--All three morphological entities had identical patterns of gene rearrangements. CONCLUSIONS--This finding confirms the association between MALT lymphoma and monocytoid B cell lymphoma, and also provides evidence that large cell anaplastic lymphoma may not only arise de novo but may also be an end stage morphological picture in lymphoma progression.

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