Is a re ct scan appropriate for 3.4mm stone in right proximal uteter of horshoe kidney? mild achy pain to right side for 8 months. ivp was normal.

CT is: appropriate for following up calculi, but you should probably consult with a urologist about the most appropriate next steps for you.

Yes: CT scan with contrast is an appropriate . A stone that is 3.4mm will usually pass spontaneously. If pain becomes intolerable, then transurethral extraction by various means is an alternative. Be sure you are under the care of a urologist. Goog luck.