Single-needle percutaneous foamed sclerotherapy using ultrasound and fluoroscopy guidance using "contrast washout technique" for the treatment of a slow-flow chest wall vascular malformation in a pediatric patient.

Venous malformations (VMs) are the most common type of vascular malformation. In resource-limited settings, treating these with minimally invasive and cost-effective approaches can achieve optimal outcomes. We present the case of a 7-year-old child with a large, slow-flow VM on the right anterior chest wall, successfully treated with ultrasound- and fluoroscopy-guided foam sclerotherapy using polidocanol via the ``contrast washout'' technique. The procedure resulted in significant lesion resolution with no post-procedural pain. In addition to its effectiveness, this approach also spares patients from extensive surgical interventions, making it a valuable treatment option for pediatric VMs.