alexa Histopathological analysis and clinical correlation of drug reaction with eosinophilia and systemic symptoms (DRESS).
Pathology

Pathology

Journal of Clinical & Experimental Pathology

Author(s): Chi MH, Hui RC, Yang CH, Lin JY, Lin YT

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BACKGROUND: Drug reaction with eosinophilia and systemic symptoms (DRESS) is a severe cutaneous adverse drug reaction. However, its histopathological features have not been well defined. OBJECTIVES: To identify the clinicohistopathological findings of DRESS, and analyse the cutaneous histopathological changes observed in DRESS compared with those observed in maculopapular exanthema (MPE). METHODS: In a retrospective study, conducted at Chang Gung Memorial Hospital (Taiwan) between 2001 and 2011, we compared the clinicohistopathological features of 32 patients with probable/definite DRESS (defined by the RegiSCAR scoring system) with those of 17 patients with MPE. RESULTS: The major pathological changes observed in patients with DRESS included dyskeratosis (97%), epidermal spongiosis (78%), interface vacuolization (91%), perivascular lymphocytic infiltration (97%) and eosinophilic infiltration (72%). Many pathological features were common to both MPE and DRESS. However, severe dyskeratosis, epidermal spongiosis and severe interface vacuolization were significantly more prominent in cases of DRESS (P < 0·05). The presence of severe dyskeratosis was significantly associated with the clinical severity of renal impairment (P = 0·01). CONCLUSIONS: The severe dyskeratosis detected in patients with DRESS may correlate with a greater extent of systemic involvement compared with that noted in MPE. However, the histopathological changes associated with DRESS are not entirely specific.

This article was published in Br J Dermatol and referenced in Journal of Clinical & Experimental Pathology

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