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Association of erythrodermic cutaneous T-cell lymphoma, superantigen- positive Staphylococcus aureus, and oligoclonal T-cell receptor V beta gene expansion

CM Jackow, JC Cather, V Hearne, AT Asano, JM Musser and M Duvic

Department of Dermatology, University of Texas Medical School, Houston, USA.

Forty-two patients with cutaneous T-cell lymphoma, including 31 with exfoliative erythroderma or Sezary syndrome and 11 with mycosis fungoides, were studied for the occurrence of staphylococcal infection. Thirty-two of 42 (76%) had a positive staphylococcal culture from skin or blood. One half of the patients with positive cultures grew Staphylococcus aureus. This group included 11 with Sezary syndrome and 5 with rapidly enlarging mycosis fungoides plaques or tumors. All of the S aureus carried enterotoxin genes. Surprisingly, 6 of 16 strains were the same toxic shock toxin-1 (TSST-1)-positive clone, designated electrophoretic type (ET)-41. Analysis of the T-cell receptor V beta repertoire in 14 CTCL patients found that only 4 had the expected monoclonal expansion of a specific V beta gene, whereas 10 had oligoclonal or polyclonal expansion of several V beta families. All patients with TSST-1+ S aureus had overexpansion of V beta Z in blood and/or skin lesions. These studies show that S aureus containing superantigen enterotoxins are commonly found in patients with CTCL especially individuals with erythroderma where they could exacerbate and/or perpetuate stimulate chronic T-cell expansion and cutaneous inflammation. Attention to toxigenic S aureus in CTCL patients would be expected to improve the quality of care and outcome of this patient population.

Volume 89, Issue 1, pp. 32-40, 01/01/1997
Copyright © 1997 by The American Society of Hematology


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