House-dust mite-crustaceans-molluscs-syndrome. A rare variant of food allergy due to cross-reactivity by primary sensitisation to inhaled allergens

80% of all cases in food allergy in adults are preceded by a clinical or su bclinical sensitisation to inhalative allergens. Food allergy is caused by cross-reactions between ingested food and inhaled particles. We report a pa tient suffering from the house-dust mite crustaceans - molluscs - syndrome. Here, house-dust mite is the sensitising agent, therefore even first inges tion of invertebrates such as snails, shrimps, mussels or oysters can lead to severe anaphylaxis.