Multiple endocrine neoplasia type 2 CT: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| Line 10: | Line 10: | ||
===Parathyroid Carcinoma=== | ===Parathyroid Carcinoma=== | ||
* Three-dimensional single-photon emission CT (SPECT) is used for preoperative preadenoma localization. | * Three-dimensional single-photon emission CT (SPECT) is used for preoperative preadenoma localization. | ||
* In the past CT was more commonly used in the setting of a failed parathyroidectomy for the detection of suspected ectopic glands (often mediastinal) 6. | |||
* However, in recent years, 4D-CT has emerged as valuable modality especially in the era of minimally invasive parathyroidectomy. This type of surgery requires precise localization with anatomical detail and a confident diagnosis of parathyroid adenoma. 4DCT has been shown to be more sensitive than sonography and scintigraphy for preoperative localisation of parathyroid adenomas<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> | |||
===Pheochromocytoma=== | ===Pheochromocytoma=== | ||
Revision as of 18:25, 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 CT On the Web |
|
American Roentgen Ray Society Images of Multiple endocrine neoplasia type 2 CT |
|
Directions to Hospitals Treating Multiple endocrine neoplasia type 2 |
|
Risk calculators and risk factors for Multiple endocrine neoplasia type 2 CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]
Overview
CT
Medullary Thyroid Carcinoma
- Both primary and metastatic lesions usually have irregular dense calcific foci within.[1]
- In the chest, bullae formation and pulmonary fibrosis might happen as a result of a desmoplastic reaction.
Parathyroid Carcinoma
- Three-dimensional single-photon emission CT (SPECT) is used for preoperative preadenoma localization.
- In the past CT was more commonly used in the setting of a failed parathyroidectomy for the detection of suspected ectopic glands (often mediastinal) 6.
- However, in recent years, 4D-CT has emerged as valuable modality especially in the era of minimally invasive parathyroidectomy. This type of surgery requires precise localization with anatomical detail and a confident diagnosis of parathyroid adenoma. 4DCT has been shown to be more sensitive than sonography and scintigraphy for preoperative localisation of parathyroid adenomas
Pheochromocytoma
- CT is the first imaging modality to be used, with an overall sensitivity of 89%. This is on account of 98% of tumors being located within the abdomen and 90% limited to the adrenal glands[2]
- Usually large, heterogeneous masses with areas of necrosis and cystic change
- They typically enhance avidly[3]
- May wash out similar to an adrenal adenoma, but they tend to have greater enhancement in an arterial or portal venous contrast phase
- Tend to enhance more on the portal venous phase than the arterial phase
- 110 HU of enhancement on the arterial phase is compatible with pheochromocytoma; hypervascular metastases could be considered in an appropriate setting
- Up to 7% demonstrate areas of calcification[4]
- An adrenal pheochromocytoma
- It should be noted, that in patients with suspected pheochromocytomas contrast may be contraindicated as it could precipitate a hypertensive crisis.
-
![PheochromocytomaCase courtesy of Dr Paresh K Desai , [5]](/images/7/7e/Pheochromocytoma_CT.jpg)
PheochromocytomaCase courtesy of Dr Paresh K Desai , [5]
-
![Pheochromocytoma Case courtesy of Dr Frank Gaillard, [6]](/images/0/01/Pheochromocytoma_CT_2.jpg)
Pheochromocytoma Case courtesy of Dr Frank Gaillard, [6]
-
![Case courtesy of Dr Roberto Schubert, [7]](/images/0/08/Pheochromocytoma_CT_04.jpg)
Case courtesy of Dr Roberto Schubert, [7]
-
![Case courtesy of Dr Nafisa Shakir Batta, [8]](/images/c/c5/Pheochromocytoma_CT_05.jpg)
Case courtesy of Dr Nafisa Shakir Batta, [8]
![PheochromocytomaCase courtesy of Dr Paresh K Desai , [5]](/index.php/File:Pheochromocytoma_CT.jpg)
![Pheochromocytoma Case courtesy of Dr Frank Gaillard, [6]](/index.php/File:Pheochromocytoma_CT_2.jpg)
![Case courtesy of Dr Roberto Schubert, [7]](/index.php/File:Pheochromocytoma_CT_04.jpg)
![Case courtesy of Dr Nafisa Shakir Batta, [8]](/index.php/File:Pheochromocytoma_CT_05.jpg)
Reference
- ↑ McCook TA, Putman CE, Dale JK, Wells SA (1982). "Review: Medullary carcinoma of the thyroid: radiographic features of a unique tumor". AJR Am J Roentgenol. 139 (1): 149–55. doi:10.2214/ajr.139.1.149. PMID 7046403.
- ↑ Blake, Michael (2009). Adrenal imaging. Totowa, NJ: Humana Press. ISBN 193411586X.
- ↑ Blake MA, Kalra MK, Maher MM, Sahani DV, Sweeney AT, Mueller PR; et al. (2004). "Pheochromocytoma: an imaging chameleon". Radiographics. 24 Suppl 1: S87–99. doi:10.1148/rg.24si045506. PMID 15486252.
- ↑ Reiser, Maximilian (2008). Magnetic resonance tomography. Berlin: Springer. ISBN 354029354X.
- ↑ "http://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="http://radiopaedia.org/cases/6819">rID: 6819
- ↑ "http://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="http://radiopaedia.org/cases/6478">rID: 6478
- ↑ "http://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="http://radiopaedia.org/cases/16148">rID: 16148
- ↑ "http://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="http://radiopaedia.org/cases/29512">rID: 29512