Ultrasonography of acute epitrochlear lymphadenitis.

While the clinical symptomatology and radiographic findings of acute suppurative infection of the epitrochlear lymph nodes of the arm have been previously described, ultrasonographic findings have not been reported. This case report demonstrates that sonographic identification of enlarged epitrochlear lymph nodes immediately confirms the diagnosis. We summarize the clinical, radiological, and sonographic findings of acute suppurative infection of the epitrochlear lymph nodes.