Journal of the European Academy of Dermatology and Venereology : JEADV
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J Eur Acad Dermatol Venereol · Sep 1998
Case ReportsDepot sulfonamid associated linear IgA bullous dermatosis with erythema multiforme-like clinical features.
A case of erythema multiforme-like reaction, following therapy with sulfadimethoxynum is reported in a 19-year-old male patient. Histological examination demonstrated a subepidermal bulla and direct immunofluorescence revealed linear deposition of IgA at the dermoepidermal junction. These observations illustrate that linear IgA bullous dermatosis can mimic the clinical features of erythema multiforme and suggest the possibility of drug-induced pathogenesis.
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J Eur Acad Dermatol Venereol · May 1998
'Suction split' as a routine method to differentiate epidermolysis bullosa acquisita from bullous pemphigoid.
Epidermolysis bullosa acquisita (EBA) and bullous pemphigoid (BP) are diseases with similar clinical, histological, and immunofluorescent findings. Diagnosis requires the use of immunoelectron microscopy, immunoprecipitation or immunoblotting, but in recent years the differential diagnosis has been based on a cheaper technique named salt split skin. This study demonstrates that with a suction blister the fracture is at the same level as that obtained with the sodium split method and that it is also faster and cheaper. Suction blisters on normal skin and autoimmune perilesional bullous lesions, obtained with a hand vacuum pump, were studied by direct immunofluorescence and electron microscopy to evaluate the level of the split on normal suction split skin. Normal human split skin was also used as a substrate for an indirect immunofluorescent study using sera of patients with BP (68 sera), EBA (10 sera) and cicatricial pemphigoid (CP) (16 sera). Direct immunofluorescent examination was also done on perilesional skin after artificial separation obtained with a hand-vacuum pump in patients with the same diseases listed above (32 BP, 11 CP, 6 EBA). ⋯ 'Suction split' represents a simple technique to differentiate EBA from BP. This method provides final response in a few hours compared to at least 1-2 days with the sodium split method. Furthermore, the suction split method is cheaper and the tissue can be re-utilized for molecular biology and immunohistochemical studies.