Multiple endocrine neoplasia type 2 MRI: Difference between revisions
Jump to navigation
Jump to search
Line 6: | Line 6: | ||
===Parathyroid Carcinoma=== | ===Parathyroid Carcinoma=== | ||
* MRI is infrequently utilized in initial work up because of lower spatial resolution and artifacts. Adenomas can show variable signal intensity on MRI. Reported signal characteristics include:<ref name=Radiopaedia 2015 Parathyroid adenoma>{{cite web | title = Radiopedia 2015 Parathyroid adenoma [Dr Bruno Di Muzio and Dr Yuranga Weerakkody]| url = http://radiopaedia.org/articles/parathyroid-adenoma }}</ref> | * MRI is infrequently utilized in initial work up because of lower spatial resolution and artifacts. Adenomas can show variable signal intensity on MRI. Reported signal characteristics include:<ref name=Radiopaedia 2015 Parathyroid adenoma>{{cite web | title = Radiopedia 2015 Parathyroid adenoma [Dr Bruno Di Muzio and Dr Yuranga Weerakkody]| url = http://radiopaedia.org/articles/parathyroid-adenoma }}</ref> | ||
:* T1 | :* '''T1''' | ||
::* Typically intermediate to low signal | ::* Typically intermediate to low signal | ||
::* Subacute haemorrhage can cause high signal intensiy<ref name="pmid17515397">{{cite journal| author=Johnson NA, Tublin ME, Ogilvie JB| title=Parathyroid imaging: technique and role in the preoperative evaluation of primary hyperparathyroidism. | journal=AJR Am J Roentgenol | year= 2007 | volume= 188 | issue= 6 | pages= 1706-15 | pmid=17515397 | doi=10.2214/AJR.06.0938 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17515397 }} </ref> | ::* Subacute haemorrhage can cause high signal intensiy<ref name="pmid17515397">{{cite journal| author=Johnson NA, Tublin ME, Ogilvie JB| title=Parathyroid imaging: technique and role in the preoperative evaluation of primary hyperparathyroidism. | journal=AJR Am J Roentgenol | year= 2007 | volume= 188 | issue= 6 | pages= 1706-15 | pmid=17515397 | doi=10.2214/AJR.06.0938 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17515397 }} </ref> | ||
::* Fibrosis or old haemorrhage can cause low signal intensity | ::* Fibrosis or old haemorrhage can cause low signal intensity | ||
:* T2 | :* '''T2''' | ||
::* Typically hyperintense | ::* Typically hyperintense | ||
::* Subacute haemorrhage can cause high signal intensity | ::* Subacute haemorrhage can cause high signal intensity |
Revision as of 18:31, 23 September 2015
Multiple endocrine neoplasia type 2 Microchapters |
Differentiating Multiple endocrine neoplasia type 2 from other Diseases |
---|
Diagnosis |
Treatment |
Multiple endocrine neoplasia type 2 MRI On the Web |
American Roentgen Ray Society Images of Multiple endocrine neoplasia type 2 MRI |
Directions to Hospitals Treating Multiple endocrine neoplasia type 2 |
Risk calculators and risk factors for Multiple endocrine neoplasia type 2 MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]
Overview
MRI
Parathyroid Carcinoma
- MRI is infrequently utilized in initial work up because of lower spatial resolution and artifacts. Adenomas can show variable signal intensity on MRI. Reported signal characteristics include:
- T1
- Typically intermediate to low signal
- Subacute haemorrhage can cause high signal intensiy[1]
- Fibrosis or old haemorrhage can cause low signal intensity
- T2
- Typically hyperintense
- Subacute haemorrhage can cause high signal intensity
- Fibrosis or old haemorrhage can cause low signal intensity
- Since most lesions demonstrate high T2 signal intensity, the addition of contrast for MR scanning does not significantly increase detection.
Pheochromocytoma
- MRI is the most sensitive modality for identification of pheochromocytomas, and is particularly useful in cases of extra-adrenal location. The overall sensitivity is said to be 98%.[2]
- T1
- Slightly hypointense to the remainder of the adrenal
- If necrotic and/or haemorrhagic then signal will be more heterogeneous
- T2
- Markedly hyperintense (lightbulb sign): this is a helpful feature
- Areas of necrosis/haemorrhage/calcification will alter signal
- T1 C+ (Gd)
- Heterogenous enhancement
- Enhancement is prolonged, persisting for as long as 50 minutes[3]
-
Case courtesy of Dr G Balachandran, [8]
Reference
- ↑ Johnson NA, Tublin ME, Ogilvie JB (2007). "Parathyroid imaging: technique and role in the preoperative evaluation of primary hyperparathyroidism". AJR Am J Roentgenol. 188 (6): 1706–15. doi:10.2214/AJR.06.0938. PMID 17515397.
- ↑ Blake, Michael (2009). Adrenal imaging. Totowa, NJ: Humana Press. ISBN 193411586X.
- ↑ Reiser, Maximilian (2008). Magnetic resonance tomography. Berlin: Springer. ISBN 354029354X.
- ↑ "http://radiopaedia.org/">Radiopaedia.org
- ↑ "http://radiopaedia.org/cases/8550">rID: 8550
- ↑ "http://radiopaedia.org/">Radiopaedia.org
- ↑ "http://radiopaedia.org/cases/9920">rID: 9920
- ↑ "http://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="http://radiopaedia.org/cases/10249">rID: 10249