Children with HSP with abdominal pain had lower IgA (Z = −2.326, P = 0.02), IgG (Z = −3.251, P = 0.001), INF-γ (Z = −2.222, P = 0.026), and CD3+ T cells (Z = −2.099, P = 0.036) than children without abdominal pain (Fig. 2). Here, CD79A is linked to hereditary spastic paraplegia.