In addition, this study found that the incidence of cervical lymphadenopathy, hepatomegaly, splenomegaly, and puffy eyelids, and the levels of immunoglobulins (IgA, IgG, and IgM) in children with IM was higher than that in children with infectious diseases caused by other pathogens. The gene discussed is CD40LG; the disease is Splenomegaly.