The authors report the case of a 13-year-old migrant girl with urinary tuberculosis, presenting with urinary tract infection, severe frequency and unexplained fever. Intravenous urography demonstrated a non-functioning left kidney and a small fibrotic bladder. Retrograde cystography revealed stage 4 right vesicoureteric reflux. The presence of the Koch bacillus was identified on urine culture. Medical treatment by Rifampicin and Isoniazid was instituted for 18 months. Surgical management, consisting of left nephroureterectomy, subtotal cystectomy with augmentation enterocystoplasty and resection of the pelvic part of the right ureter with ureterointestinal reimplantation, was performed. With a follow-up of 19 years, this patient has normal renal function and no urinary disorders. This case recalls the reality of urinary tuberculosis in children and confirms its insidious nature. The destructive course of urinary tuberculosis may require major urinary tract reconstruction, as in our case.