Diagnosis of perigraft seroma formation by use of echocardiography after modified Blalock-Taussig shunt.

Perigraft seroma is a collection of non-secretory fibrous pseudomembrane surrounding a vascular graft, which is a collection of clear, sterile fluid. Thoracal computed tomography, Magnetic Resonance Imaging, and thoracal ultrasonography have been proposed for diagnosis of this pathology. A consecutive modified Blalock–Taussig (m-BT) shunt complicated by perigraft seroma formation, which is diagnosed using a Doppler ultrasonography (US), is presented here.