pemphigus: a skin disease characterized by large thin-walled blisters (bullae) arising from normal skin or mucous membrane
autoimmune disease: any of a large group of diseases characterized by abnormal functioning of the immune system that causes your immune system to produce antibodies against your own tissues
stropharia: genus of gill fungi with brown spores that is closely related to Agaricus; here placed in its own family Strophariaceae