The Chiari Network—Only an Embryonic Remnant or a Confusing Finding?

Abstract

Chiari network is an embryonic remnant of valves of the sinus venosus, which can be observed in several locations in the right atrium. Although it is usually considered a normal anatomic variant, when associated with certain clinical conditions, the Chiari network may become a confusing finding, and a careful differential diagnosis is required. It should be differentiated from a tricuspid valve disruption, vegetation, thrombus, or tumoral mass. In this case report, we describe a singular case of endocarditis over a Chiari network in a seven-year-old boy that was successfully managed in a conservative fashion.