Needle track recurrence after biopsy of non-metastatic Wilms tumour

A 2-year-old girl presented with a left-sided Wilms tumour. She was randomised to have a needle biopsy and preoperative chemotherapy according to the United Kingdom Children's Cancer Study Group (UKCCSG) protocol, a trial of preoperative chemotherapy in biopsy-proven Wilms tumour versus immediate nephrectomy (UK 9101). A nephrectomy was performed 6 weeks later. Six months later she presented with an abdominal wall recurrence at the needle biopsy site, which was resected. The value of needle biopsy in localised Wilms tumour is debated.