Aspirin "Allergy"-Induced Thrombocytopenia: A Case Report.

Aspirin is clinically widely used to inhibit platelet aggregation after coronary intervention. Herein we describe a case of aspirin-induced thrombocytopenia that may be related to allergy to aspirin. A 47-year-old man developed a delayed hypersensitivity reaction to aspirin, with pruritus, purpura and thrombocytopenia, increased peripheral blood eosinophils and enlarged inguinal lymph node. All the symptoms disappeared in 2 years after stopping aspirin. Aspirin-induced thrombocytopenia related to allergy is rarely reported. Aspirin hypersensitivity should be taken into consideration in case of unexplained thrombocytopenia in patients taking aspirin. Aspirin "allergy"-induced thrombocytopenia may involve both aspirin related IgG and IgE antibodies.