Femoral artery thrombosis is described following successful transcatheter control of haematuria due to an arteriovenocaliceal fistula following percutaneous renal biopsy in a 9-year-old girl. Emergency embolectomy and profundoplasty was required to salvage the affected limb. Peripheral embolization is a serious potential complication of transcatheter embolization. The possible mechanism of distal thrombosis, other than reflux of embolic material is also discussed.