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Br J Dermatol 2002 May;146(5):882-4
Department of Dermatology, Asan Medical Center, College of Medicine, University of Ulsan, 388-1 Poongnap-dong, Songpa-gu, Seoul 138-736, Korea.
Cases of pseudolymphoma induced by intradermal gold injection or gold piercing have previously been described. Most of these cases showed the histopathological finding of B-lymphocyte predominant lymphocytoma cutis. We describe a patient with gold acupuncture-induced T-cell-rich pseudolymphoma. Some T cells showed positive staining with CD30. The lesions responded to an intralesional injection of triamcinolone acetonide.
PMID: 12000389, UI: 21995937
Other Formats:
Br J Dermatol 2002 May;146(5):764-9
Department of Dermatology, Faculty of General Medicine, University of Szeged, Szeged, Hungary. kl@derma.szote.u-szeged.hu
BACKGROUND: It is well known from clinical practice that repeated treatment with dithranol leads to the development of tolerance. OBJECTIVES: To investigate the characteristics and mechanism of such dithranol tolerance. METHODS: The mouse ear was pretreated with a low dose of dithranol or croton oil or, in previously sensitized animals, with dinitrofluorobenzene (DNFB). Twenty-four hours later irritant dermatitis was elicited by painting the mouse ear with a high dose of dithranol, croton oil or DNFB, and the dermatitis was characterized by measurement of ear thickness. RESULTS: Low-dose dithranol significantly suppressed dithranol-induced oedema, whereas it had no effect on croton oil- or DNFB-induced dermatitis, suggesting that dithranol-induced tolerance is specific. Tolerance to dithranol could not be induced by pretreatment of the mouse ear with a low dose of croton oil or DNFB. Mild tape stripping of the mouse ear also inhibited the inflammatory effect of dithranol applied 24 h later. Superoxide dismutase treatment abolished the tolerance-inducing effect of low-dose dithranol or stripping. CONCLUSIONS: These results suggest that superoxide anion radicals are involved not only in the inflammatory effect of dithranol, but also in the induction of tolerance.
PMID: 12000371, UI: 21995919
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