Page kidney: Hypertension secondary to extra-renal compression

Page kidney refers to the development of secondary hypertension due to compression of the kidney by an external source, most commonly a subcapsular hematoma. Compression of the renal parenchyma results in hypoperfusion and microvascular ischemia leading to activation of the renin-angiotensin system and elevation of blood pressure. Until the last decade, Page kidney was primarily diagnosed in young men with unexplained hypertension and a history of sports-related trauma and imaging studies demonstrating a subcapsular hematoma. Treatment varies from conservative, medical management to a nephrectomy, depending on how the patient's blood pressure responds to treatment.