<s>[INST] Hello,My 15 year old daughter has just been told after 18 months of pain and infections that she has two tubes in her right kidney.  When she was a small child she suffered kidney problems but this was never picked up on.  When could this second tube have grown and why?thank you very much, Paula [/INST] HIIT seems from your description that your daughter has duplex ureter which is usually associated with duplex kidney. She has been born with it and does not grow later. This condition may not be picked upon ultrasound of kidneys in childhood and may be revealed later when problem develops either on CT scan or rarely on ultrasound. Duplex kidney and ureter by itself do not cause pain and infections unless associated with other conditions as reflux of urine, ureteroscope etc. </s>