Primary Cutaneous Follicle Center Lymphoma of the Arm with a Novel Chromosomal Translocation t(12;21)(q13;q22): A Case Report

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We report a reciprocal translocation between the long arms of chromosomes 12 and 21, t(12;21)(q13;q22), in a patient with primary cutaneous follicle center lymphoma. Follicle center lymphoma of the skin and follicle center cell lymphoma of the lymph node are morphologically and immunophenotypically very similar. However, the clinical behavior and prognosis of these tumors are different due to the molecular basis of these malignancies. Follicle center cell lymphoma of the lymph node is determined by the presence of a unique translocation between chromosomes 14 and 18, t(14;18)(q32;q21), BCL-2-JH gene rearrangement, that is not present in primary cutaneous follicle center lymphomas. Chromosomal translocations in the primary skin lymphomas have not been previously reported. We hope that our discovery of a new translocation t(12:21)(q13q22) will encourage further investigation into the molecular basis of this translocation and other cytogenetic abnormalities in primary cutaneous B-cell lymphomas. Am. J. Hematol. 81:448-453, 2006. © 2006 Wiley-Liss, Inc.

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