Focal nodular hyperplasia in pediatric patients with and without oncologic history

The diagnosis of FNH is warranted by the possibility of avoiding unnecessary hepatic resections. The 18 patients of our series, 6 of whom were long-term survivors of malignant, non-hepatic tumors, underwent either a biopsy or a complete excision to obtain the diagnosis. The imaging characteristics could not be considered pathognomonic. The lesion remained stable after the biopsy in 8 patients; no complications were observed in other 10 patients who underwent resection of the mass. The outcome of all our patients with or without previous oncological disease was benign.