In this case, there was poor preoperative response to oxygen therapy, and patient has immediately improved after surgical treatment. However, after surgical resection of the largest PAVF, another fistula increased, thus leading to decrease in postoperative SpO2, reverted by embolization. As the child grows, other pulmonary fistula or fistulae in other organs may be diagnosed, indicating Rendu-Osler-Weber Syndrome.
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