Unilateral renal agenesis revealed by hydronephrosis of contralateral kidney and explored by 99mTc-DMSA and 99mTc-DTPA scintigraphy

Renal scintigraphy is a physio-functional exploration permitting the exploration and assertion of unilateral renal agenesis. We report the case of a patient followed for a right hydronephrosis having revealed an agenesis of the contralateral kidney confirmed by 99mTc-DMSA scintigraphy. Also 99mTc-DTPA scintigraphy allowed the evaluation of the permeability of the urinary tract of the single right kidney by confirming the presence of an organic obstruction. This contributed to a surgical treatment of the obstruction and the re-establishment of the permeability of the right urinary tract. This case suggests that renal scintigraphy is useful to confirm the authenticity of renal agenesis by eliminating the possibility of renal hypoplasy and also to evaluate the functional potential and the permeability of contralateral and single unique tract considered like very precious.