A renal solitary fibrous tumor (SFT) is an unusual and especially rare entity. Preoperative diagnosis usually difficult, but it remains of favorable prognosis. In this study, the authors report a case 33-year-old Moroccan man with history left pyelolithotomy who presented 19 cm mass associated two kidney stones in lower calyx. He underwent open radical nephrectomy, pathology revealed SFT. To be...