Mugwort-Mustard Allergy Syndrome due to Broccoli Consumption.

Pollen-food allergy syndrome (PFAS) is a relatively rare form of food allergy which develops in individuals who are sensitized to pollen. Tree pollens, especially birch pollen, frequently induce PFAS; however, the incidence of PFAS due to grass or weed pollens such as ragweed or mugwort is relatively rare. Mugwort-mustard allergy syndrome (MMAS) is an example of a PFAS in which individuals sensitized to mugwort may develop an allergy to mustard and experience severe reactions. We herein describe a case of MMAS due to broccoli consumption.