June 1993, Vol 129, No. 6 >

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Article | June 1993

Floor-Pattern Salt-Split Skin Cannot Distinguish Bullous Pemphigoid From Epidermolysis Bullosa Acquisita: Use of Toad Skin

Bryan K. Pang, MBBS; Y. S. Lee, FRCPA; K. V. Ratnam, MRCP(UK)

Arch Dermatol. 1993;129(6):744-746. doi:10.1001/archderm.1993.01680270082010.

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• Background and Design.— Patients with epidermolysis bullosa acquisita (EBA) and bullous pemphigoid (BP) can present with similar clinical features. These antigens have different phylogenetic origins. It was thought that sodium chloride split-skin immunofluorescence could reliably distinguish between BP and EBA. However, it has now been recognized that both diseases can present with a floor pattern fluorescence on salt-split skin. A simple method is required to distinguish these diseases.

Results.— Serum specimens from two patients presenting with pruritic blisters showing a floor pattern immunofluorescence on salt-split skin were found to have positive fluorescence on toad skin that has the BP and not the EBA antigen. The diagnosis of BP in these patients was confirmed by a prompt response to treatment with systemic steroids. Electron microscopy showed a split at the lamina lucida.

Conclusions.— Bullous pemphigoid can present with a floor pattern immunofluorescence on salt-split skin. The use of the skin from invertebrates like the toad may help in distinguishing BP from EBA.(Arch Dermatol. 1993;129:744-746)

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Pang BK, Lee YS, Ratnam KV. Floor-Pattern Salt-Split Skin Cannot Distinguish Bullous Pemphigoid From Epidermolysis Bullosa Acquisita: Use of Toad Skin. Arch Dermatol. 1993;129(6):744-746. doi:10.1001/archderm.1993.01680270082010.

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Floor-Pattern Salt-Split Skin Cannot Distinguish Bullous Pemphigoid From Epidermolysis Bullosa Acquisita: Use of Toad Skin

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