An unusual case of lower limb dysplasia with ulcer after interventional closure of PDA in childhood

Background: Lower limb dysplasia is a rare complication after interventional closure of patent ductus arteriosus (PDA) in childhood. The most common treatment of PDA is interventional closure via femoral artery. Compared with traditional surgery, its advantages include less trauma and faster postoperative recovery, but the complications after interventional occlusion should not be ignored. Case presentation: A 10-year-old girl had redness and swelling of the toes of the right lower limb with skin ulceration on the medial side of the right foot for more than 4 months. She accepted interventional closure of PDA 7 years ago. Physical examination showed that the right foot was about 2 cm shorter than the left foot. We present a rare case of a young girl with lower limb dysplasia after interventional closure of PDA in childhood, Combined findings of Color Doppler ultrasound, Intravenous Ultrasound (IVUS), Computed tomography angiography (CTA) and Angiography, we found right foot developmental delay most likely was due to vascular injury after interventional closure of PDA in childhood. Conclusion: It is critical to understand not only the acute but also the long-term complications that may occur after interventional procedure. To avoid the development of vascular injury, it is advised that patients who underwent femoral artery catheterization for interventional treatment in their early years undergo strict clinical and imaging surveillance.