A nurse is reviewing the medical record of a school-age child who has immune thrombocytopenia. Which of the following findings should the nurse identify as a potential cause for this disorder? (Select all that apply.)

A. While environmental allergens can trigger allergic reactions, they do not contribute to the immune-mediated destruction of platelets seen in ITP. Allergic responses primarily affect histamine release and inflammation, but they do not cause autoimmune platelet destruction. B. ITP often develops after viral infections, such as upper respiratory infections, varicella (chickenpox), or Epstein-Barr virus. The immune system can create autoantibodies that mistakenly target platelets, leading to thrombocytopenia. Viral infections are one of the most common triggers for pediatric ITP, which is typically acute and self-limiting in children. C. Children with autoimmune disorders such as systemic lupus erythematosus (SLE), autoimmune thyroid disease, or rheumatoid arthritis are at higher risk for ITP. In these conditions, the immune system attacks the body’s own platelets, contributing to chronic or recurrent thrombocytopenia. Recognition of coexisting autoimmune disorders helps in diagnosis and management planning. D. Some children with ITP have been found to have H. pylori infection, which can act as an immune trigger. In certain cases, treatment of H. pylori can lead to improved platelet counts, suggesting a causal or contributory role. Nurses should be aware of this possible link when assessing ITP etiology. E. Contact dermatitis is a localized inflammatory skin response to irritants or allergens and does not involve the immune mechanisms responsible for platelet destruction. It is unrelated to ITP development. F. ITP is immune-mediated and not typically triggered by acute dietary changes. While food allergies can cause histamine-mediated reactions, they do not cause autoantibody-mediated platelet destruction characteristic of ITP.