Useful when cross-sectional imaging is negative and an ectopic pheochromocytoma is suspected.

What is an MIBG scan

  • Uses a radiactive substance (tracer) and a scanner to find the presence of pheochromocytoma or neuroblastoma.
  • MIBG is the radioisotope. ¬†metaiodobenzylguanidine
  • Patients are sometimes given an iodine mixture to prevent the thyroid gland from absorbing too much of the radioisotope.
  • 90% sensitive for detection of pheochromocytomas
  • FDOPA (fluoro-Dopa) PET/CT scan is also available for the detection of pheochromocytomas

 Pheochormocytomas typically show evidence of hyperintensity on T2 weighted MRI.

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