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Intrapericardial paragangliomas (pheochromocytomas): imaging features
B H Hamilton1, I R Francis, B H Gross
1Department of Radiology, University of Michigan Hospitals, Ann Arbor 48109-0030, USA.
AJR. American Journal of Roentgenology
|January 1, 1997
Summary
Intrapericardial paragangliomas, rare tumors near the left atrium, are best detected using MIBG scintigraphy. Dynamic contrast-enhanced CT or MR imaging then provides detailed anatomy for surgical planning.
Area of Science:
- Cardiology
- Oncology
- Radiology
Background:
- Intrapericardial paragangliomas are rare extra-adrenal tumors.
- These tumors are often located adjacent to or involve the left atrium.
Purpose of the Study:
- To describe the imaging features of intrapericardial paragangliomas.
- To evaluate the diagnostic utility of different imaging modalities for these tumors.
Main Methods:
- Retrospective review of imaging features of intrapericardial paragangliomas over 13 years.
- Analysis of Metaiodobenzylguanidine (MIBG) scintigraphy and dynamic contrast-enhanced CT findings.
Main Results:
- Tumor location: typically adjacent to or involving the left atrium.
- Tumor size: 3 to 8 cm in diameter.
- MIBG scintigraphy detected 11 of 12 tumors (92% sensitivity); dynamic contrast-enhanced CT detected all 12 tumors.
Conclusions:
- Intrapericardial paragangliomas are rare, often left atrium-associated tumors.
- MIBG scintigraphy is recommended for initial detection and metastasis assessment.
- Dynamic contrast-enhanced CT or MR imaging is crucial for pre-surgical anatomical detail.