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1. If the biochemical tests suggest a pheo, perform CT or MRI of the abdomen and pelvis to find the tumour.

2. If imaging does not show a tumor and you still suspect one given the screening tests and history,

3. Look for the tumor using a radioactive tracer (I 123 , metaiodoben­ zylguanidine [MIBG] scintigraphy, a norepinephrine analog that concentrates in adrenals and pheos),

4. PET scan, or total body MRI.


1. Wilkinson, I. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press.
2. Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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