Background: Single coronary ostium concomitant with coronary artery fistula is a very rare congenital anomaly. Apart from that, the combination of a closed loop of the coronary artery has never been reported. Case presentation: Herein, we present a 7-year-old girl diagnosed as single left coronary ostium with a giant coronary trunk, coronary artery to right ventricle fistula, and coronary artery ring. The coronary fistula was surgically ligated with off-pump strategy and the patient discharged on postoperative day 5 and free of symptoms during the 3 years of follow-up. Conclusion: To our knowledge, the presented congenital coronary anomaly is the first to be reported in the literature with the name of congenital coronary artery ring with single left coronary ostium and fistula.

中文翻译：

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病例报告：具有单个左冠状动脉口和瘘的先天性冠状动脉环：以前未报告的解剖结构。

背景：单冠状动脉口伴有冠状动脉瘘是一种非常罕见的先天性异常。除此之外，从未报道过冠状动脉闭环的组合。病例介绍：在此，我们介绍了一名 7 岁女孩，她被诊断为单左冠状动脉口，具有巨大的冠状动脉干、冠状动脉至右心室瘘管和冠状动脉环。冠状动脉瘘采用非体外循环策略进行手术结扎，患者在术后第 5 天出院，并在 3 年的随访期间无症状。结论：据我们所知，所提出的先天性冠状动脉畸形是文献中首次报道的先天性冠状动脉环伴单个左冠状动脉口瘘。