Several days ago, your colleague in the endocrinology clinic diagnosed 38-year-old Antonio with a pheochromocytoma, after he presented with unexplained clinically silent hypertension. Imaging studies revealed a 3.5 × 5 cm right-sided adrenal mass, without local invasion or metastasis.

Subsequently, Antonio was referred to the endocrine surgery unit, where you work, for surgical excision of the tumor. He is now in front of you.