Pheochromocytoma: current status and changing trends

Area of Science:

• Endocrinology
• Surgical Oncology
• Diagnostic Imaging

Background:

• Pheochromocytoma, a neuroendocrine tumor, presents diagnostic and management challenges.
• Understanding its association with multiple endocrine neoplasia (MEN) type 2 and extra-adrenal paragangliomas is crucial.
• Malignancy and survival rates impact long-term patient outcomes.

Purpose of the Study:

• To review surgical outcomes for pheochromocytoma and paraganglioma patients.
• To evaluate the diagnostic accuracy of various biochemical and imaging modalities.
• To assess trends in pheochromocytoma management over a decade.

Main Methods:

• Retrospective analysis of 106 patients undergoing pheochromocytoma surgery (1971-1980).
• Assessment of diagnostic utility of urinary metanephrines, vanillylmandelic acid, and catecholamines.
• Evaluation of preoperative localization techniques, including computed tomography (CT).

Main Results:

• 14% of patients had malignant pheochromocytomas, with higher incidence in extra-adrenal lesions.
• Five-year survival probability was 53%.
• Urinary metanephrines (95%) and vanillylmandelic acid (89%) showed high diagnostic accuracy. CT demonstrated >90% accuracy for preoperative localization.

Conclusions:

• Computed tomography has become the preferred imaging modality for pheochromocytoma localization.
• Biochemical markers like urinary metanephrines are essential for accurate diagnosis.
• Improved diagnostic accuracy and localization enhance overall pheochromocytoma management.