Pheochromocytoma: an imaging chameleon

Area of Science:

• Endocrinology
• Radiology
• Oncology

Background:

• Pheochromocytomas are rare catecholamine-secreting tumors with varied clinical and imaging presentations.
• Delayed diagnosis or treatment can lead to severe cardiovascular crises.
• Understanding diverse imaging appearances is vital for early detection.

Purpose of the Study:

• To highlight the characteristic and atypical imaging manifestations of pheochromocytomas.
• To emphasize the diagnostic challenges posed by their varied appearances across imaging modalities.
• To underscore the importance of recognizing pheochromocytomas to prevent adverse outcomes.

Main Methods:

• Review of imaging characteristics of pheochromocytomas across multiple modalities.
• Comparison of pheochromocytoma imaging findings with other adrenal lesions.
• Analysis of atypical imaging features, including T2 signal intensity, fat, hemorrhage, and calcification.

Main Results:

• Pheochromocytomas typically appear as hypervascular masses with high T2 signal intensity on MRI.
• Atypical features include low T2 signal, fatty infiltration, hemorrhage, cystic changes, and calcifications.
• Imaging findings can mimic benign and malignant adrenal adenomas, posing diagnostic challenges.

Conclusions:

• Pheochromocytomas exhibit a wide spectrum of imaging appearances, challenging radiologists.
• Awareness of both classic and atypical imaging features is essential for accurate diagnosis.
• Early recognition of pheochromocytomas is critical to avoid potentially devastating consequences.