Renal Hypertension Renal hypertension constitutes approximately fifteen per cent of all cases of hypertension. The causes can most readily be divided into three groups: renovascular, renal parenchymatous disease, and primary reninism (Fig. 10.9). See later: • Renovascular Hypertension • Renal Artery Stenosis • Malignant Hypertension • Renal Hypertension – Treatment See also: • Genetic Defects in Cortisol Synthesis – Hypertension