A Negro man developed a weeping, vesicular dermatitis following the application of a household liniment. Patch tests with the ingredients disclosed synthetic oil of mustard to be the main sensitizer. The eczematous reaction produced was remarkable because of its slow involutionary period.
GAUL LE. Contact Dermatitis From Synthetic Oil of Mustard. Arch Dermatol. 1964;90(2):158–159. doi:10.1001/archderm.1964.01600020026004
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