A case of multiple extra-adrenal pheochromocytomas

Area of Science:

• Endocrinology
• Oncology
• Surgical Pathology

Background:

• Pheochromocytomas are rare neuroendocrine tumors arising from chromaffin cells.
• Extra-adrenal pheochromocytomas (EAPs) account for 5-10% of all pheochromocytomas.
• Multiple EAPs are exceptionally rare, particularly in distinct anatomical locations.

Observation:

• A 22-year-old male presented with symptoms suggestive of a catecholamine-secreting tumor.
• Diagnostic imaging revealed two distinct masses: one in the mediastinum and another in the pelvis.
• Histopathological examination confirmed both masses as pheochromocytomas.

Findings:

• This case represents the first documented instance of multiple, spatially distant extra-adrenal pheochromocytomas in an adult patient in Japan.
• The simultaneous occurrence of EAPs in the mediastinum and pelvis highlights the potential for widespread tumor development.
• Genetic analysis may be warranted to investigate underlying predisposition syndromes.

Implications:

• This case expands the known spectrum of pheochromocytoma presentation and location.
• It underscores the importance of thorough diagnostic evaluation for patients with suspected pheochromocytomas, regardless of tumor location.
• Further research into the etiology and management of multiple EAPs is encouraged.