Largest pheochromocytoma reported in Canada: A case study and literature review.

Most giant pheochromocytomas do not present with classic symptoms, as documented by published case reports. Given this, clinicians have to consider a wide differential diagnosis for any retroperitoneal mass and perform screening tests to rule out a pheochromocytoma. We describe the largest pheochromocytoma reported in Canada, where the patient presented with a palpable abdominal mass and dyspnea. The 19 × 18 × 12-cm right retroperitoneal mass was biochemically active and was radiologically and pathologically consistent with a giant pheochromocytoma. We present this case and review the relevant current literature.