[Clear cell carcinoma of the kidney and Conn's syndrome in a patient with arterial hypertension--a case report].

Recognition of secondary arterial hypertension is one of the main purposes of diagnosis in patients with arterial hypertension. Secondary hyperaldosteronism is one of the most frequent endocrinological causes of arterial hypertension. Because of the increased risk of cardiovascular diseases in these patients, the early diagnosis and proper treatment of primary hyperaldosteronism play a crucial role. The aim of the study was presentation of a patient with secondary arterial hypertension. During the diagnosis of the hypertension cause, a renal tumor was found and then primary hyperaldosteronism due to aldosterone producing adrenal adenoma. The presented case proves the necessity of a thorough diagnosis of etiology of arterial hypertension, as it exists a possibility of coexistence of two independent causes, what can delay the diagnosis and make it more complicated.