Adrenal incidentaloma associated to elevated urinary normethanephrine in a patient with high blood pressure

OBJECTIVES: To report one case of adrenal incidentaloma and to review the sensitivity and specificity of urine methanephrines in the diagnosis of pheochromocytoma. METHODS: We report the case of a patient with high blood pressure and a left adrenal incidentaloma. Surgical excision of the mass was indicated after elevated urine methanephrine. RESULTS: Pathologic study of the nodule established the diagnosis of cortical adenoma. CONCLUSIONS: The elevation of urine normethanephrine is a non-specific parameter for the diagnosis of pheochromocytoma.