Henoch-Schönlein Purpura With Testicular Necrosis: Sonographic Findings at the Onset, During Treatment, and at Follow-up.

Henoch-Schönlein purpura (HSP) with involvement of the testes is extremely rare. Here, we present a pediatric case of HSP involving testicular ischemic necrosis in an 8-year-old child. Ultrasonography plays an important role not only in the differential diagnosis at onset, but also in the assessment of treatment response and prognosis during treatment and at follow-up. In this case report, we present the sonographic images for the entire course of testicular involvement in HSP and reveal histopathologically the pathogeny as testicular autoimmune vasculitis caused by the deposition of immunoglobulin A-containing immune complexes in the testicular vessels.