Perioperative management of pheochromocytoma/paraganglioma: is there a state of the art?

Pheochromocytoma and paraganglioma are rare tumors of sympathetic or parasympathetic origin, presenting with a highly variable clinical picture. Rarity, as well as biological, clinical, and genetic heterogeneity are barriers to initiate prospective studies that help to establish clinical guidelines. The best management of these patients relies on the experience of a multidisciplinary team. The ultimate outcome can benefit from adequate pre-surgical evaluation and treatment as well as an accurate post-surgical follow-up. Long-term follow-up is mandatory in all patients, but is particularly important in specific familial cases such as those with an SDHB mutation where the risks of recurrence are higher. The surgical approach varies depending on tumor size, location, and surgeon's personal attitude and experience. In this paper, we summarize recommendations, based mostly on authors' and other experts' personal experiences, for the best possible management of patients prior, during and after surgery, as well as when pheochromocytoma is diagnosed during pregnancy.

Long-term postoperative follow-up in patients with apparently benign pheochromocytoma and paraganglioma.

Patients with pheochromocytoma or paraganglioma are at risk of developing tumor recurrences or new tumors after successful resection of the primary tumor. This review summarizes current knowledge concerning the incidence and risk factors for such events. The overall incidence exceeds 15%. Patients with inherited tumors have a higher probability of recurrence or new tumors. Most recurrences are metastatic, particularly in patients with SDHB mutations or nonhereditary tumors. We recommend the determination of plasma or urinary metanephrines (normetanephrine and metanephrine) 1 month after surgery. In patients with sporadic, single tumors ≤5 cm in diameter, clinical and biochemical follow-up should be performed every 2 years. However, this follow-up period can be reduced to yearly, if it is more simple and more convenient for patients and physicians. Patients with larger or multiple but apparently benign tumors and/or inherited disease should be tested 6 months after surgery and then every year for the rest of their lives. Imaging follow-up is also required in patients with inherited or malignant tumors.