Granuloma fissuration of the ear appears to be the cutaneous counterpart of the lesion more commonly seen in the mouth. Chronic trauma is probably the inciting agent.
FRETZIN DF. Granuloma Fissuratum of the Ears. Arch Dermatol. 1966;93(4):448–449. doi:10.1001/archderm.1966.01600220060019
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