Case report

This 35-year-old female with hypertension was diagnosed as having primary aldosteronism as reflected by hypokalemia and an excess plasma aldosterone concentration (PAC). However, examination by computed tomography revealed a grossly enlarged left adrenal gland with a cyst-like lesion. The right adrenal appeared normal. At surgery, an adenoma and a cyst were found to coexist in the left adrenal cortex. Following laparoscopic left adrenalectomy, the patient’s blood pressure, serum potassium concentration, and PAC all normalized without the need for medical treatment.