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[[Head]], [[neck]], [[chest]], and [[abdomen|abdominal]] MRI may be helpful in the diagnosis of pheochromocytoma. | [[Head]], [[neck]], [[chest]], and [[abdomen|abdominal]] MRI may be helpful in the diagnosis of pheochromocytoma. | ||
==Key MRI Findings in Pheochromocytoma== | ==Key MRI Findings in Pheochromocytoma== | ||
Key [[MRI]] findings in pheochromocytoma are:<ref name="radio">Pheochromocytoma. Dr Matt A. Morgan and Dr Frank Gaillard Gold Supporter since June 24, 2015">. Radiopaedia.org 2015.Page http://radiopaedia.org/articles/pheochromocytoma-2</ref><ref name="pmid8076587">{{cite journal| author=Bravo EL| title=Evolving concepts in the pathophysiology, diagnosis, and treatment of pheochromocytoma. | journal=Endocr Rev | year= 1994 | volume= 15 | issue= 3 | pages= 356-68 | pmid=8076587 | doi=10.1210/edrv-15-3-356 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8076587 }}</ref> | Key [[MRI]] findings in pheochromocytoma are:<ref name="radio">Pheochromocytoma. Dr Matt A. Morgan and Dr Frank Gaillard Gold Supporter since June 24, 2015">. Radiopaedia.org 2015.Page http://radiopaedia.org/articles/pheochromocytoma-2</ref> | ||
* <ref name="pmid8076587">{{cite journal| author=Bravo EL| title=Evolving concepts in the pathophysiology, diagnosis, and treatment of pheochromocytoma. | journal=Endocr Rev | year= 1994 | volume= 15 | issue= 3 | pages= 356-68 | pmid=8076587 | doi=10.1210/edrv-15-3-356 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8076587 }}</ref>T1 slightly hypointense to the remainder of the adrenal gland, if there is a necrosis and/or hemorrhage then the signal will be more heterogeneous. | |||
* T2 markedly hyper intense '''[[Lightbulb sign|light bulb sign]]''', helpful in the diagnosis, areas of necrosis/hemorrhage/calcification will alter the signal. other adrenal tumors isointense such as the liver. | |||
* T1 C+ (Gd) heterogenثous enhancement is prolonged, persisting for as long as 50 minute | |||
* Increased attenuation on nonenhanced CT (>20 Hounsfield units. | |||
* Variable mass size and vascularity and may be bilateral. | |||
* [[Spin-spin relaxation time|T2]] weighted MRI of the [[head]], [[neck]], and [[chest]], and [[abdomen]] can help localize the tumor. | |||
'''Patient #1: Bladder pheochromocytoma''' | '''Patient #1: Bladder pheochromocytoma''' | ||
<gallery> | <gallery> | ||
Revision as of 13:55, 21 July 2017
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2] Mohammed Abdelwahed M.D[3]
Overview
Head, neck, chest, and abdominal MRI may be helpful in the diagnosis of pheochromocytoma.
Key MRI Findings in Pheochromocytoma
Key MRI findings in pheochromocytoma are:[1]
- [2]T1 slightly hypointense to the remainder of the adrenal gland, if there is a necrosis and/or hemorrhage then the signal will be more heterogeneous.
- T2 markedly hyper intense light bulb sign, helpful in the diagnosis, areas of necrosis/hemorrhage/calcification will alter the signal. other adrenal tumors isointense such as the liver.
- T1 C+ (Gd) heterogenثous enhancement is prolonged, persisting for as long as 50 minute
- Increased attenuation on nonenhanced CT (>20 Hounsfield units.
- Variable mass size and vascularity and may be bilateral.
- T2 weighted MRI of the head, neck, and chest, and abdomen can help localize the tumor.
Patient #1: Bladder pheochromocytoma
Patient #2: Abdominal pheochromocytoma
References
- ↑ Pheochromocytoma. Dr Matt A. Morgan and Dr Frank Gaillard Gold Supporter since June 24, 2015">. Radiopaedia.org 2015.Page http://radiopaedia.org/articles/pheochromocytoma-2
- ↑ Bravo EL (1994). "Evolving concepts in the pathophysiology, diagnosis, and treatment of pheochromocytoma". Endocr Rev. 15 (3): 356–68. doi:10.1210/edrv-15-3-356. PMID 8076587.