Usefulness of ultrasonography in operation for pulmonary arteriovenous fistula

A 54-year-old woman presented with nonhereditary, bilateral pulmonary arteriovenous fistulas. One of them was small (10 × 10 mm) and embedded in the parenchyma; it was neither visible nor palpable from the pleural surface. We therefore used intraoperative ultrasonography and succeeded in detecting and enucleating the small fistula with minimal resection of the normal lung tissue.