A 37-year-old male with unilateral hydronephrosis: A forgotten cause of secondary hypertension

The evaluation of Secondary hypertension is laborious, expensive and of low yield, though screening of reversible causes, is important to prevent target organ damage. Hypertension secondary to hydronephrosis is rarely described in clinical studies. We herein report a 37-year-old male with a history of resistant hypertension. Initial evaluation for a secondary cause of hypertension was negative. CT abdomen showed unilateral hydronephrosis (Right). After surgical correction, his blood pressure begins to normalize in 3 weeks with a reduction in antihypertensive drugs. The patient was off medications at 6 months of follow-up. The relief of obstruction was parallel to the normalization of blood pressure, which suggest a causal link between hydronephrosis and hypertension. Our case illustrates hydronephrosis as an important cause in the evaluation of hypertension.