Captopril Enhanced $^{99m}Tc-DMSA$ Renal Scintigraphy in A Case of Renovascular Hypertension Due to Branch Renal Artery Stenosis

Radionuclide renal scintigraphies were performed in a 24-year-old man with right renal artery branch stenosis. Captopril enhanced renal scintigraphy revealed no abnormal finding in the right kidney. But, renal scintigraphy showed regional cortical photon deficient area corresponding to the area supplied by the stenotic branch artery. The defect size increased in captopril enhanced renal scintigrphy and nearly disappeared after successful transluminal renal angioplasty. This case suggests that the captopril enhanced renal scintigraphy may be a useful method in the evaluation of renovascular hypertension, especially due to branch renal srtery stenosis.