| Imaging findings of neurogenic tumours in the head and neck region. | |
| | |
MedLine Citation:
|
PMID: 22074867 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Objective: The aim of this study was to describe the CT, MRI and ultrasonography findings of five cases of neurogenic tumours in the head and neck region. Methods: Five neurogenic tumours were analysed with respect to their CT value, the presence of cystic change, target sign, lobulation, connection to the nerve and vascularity. Results: The contrast-enhanced CT (ECT) of the schwannomas demonstrated either a mass with low enhancement (two out of three cases), which reflected the predominant Antoni B components, or a mass with cystic changes, which was an Antoni A-based schwannoma displaying cystic changes (one out of three cases). On MRI, all tumours showed homogeneous and isointense signals for muscle on T(1)-weighted images (T(1)-WIs). T(2)-weighted images (T(2)-WIs) and gadolinium (Gd)-enhanced T(1)-WIs demonstrated target sign in both schwannomas. Ultrasound examination showed a well-defined, ovoid or round hypoechoic mass. The direct connection to the nerve was demonstrated in two of the five cases. Lobulation was observed in only one of the five cases and cystic changes were observed in one of the five cases. In all of the cases, no vascularity was seen in power Doppler images (PDIs) obtained by the percutaneous approach. Conclusions: Low-enhanced areas on ECTs can be specific for schwannomas, which suggests the predominance of Antoni B components. The target sign on T(2)-WIs and Gd-enhanced T(1)-WIs can be specific, which can be used to differentiate the two different components (Antoni A and Antoni B). The direct connection to the nerve can be a specific finding for neurogenic tumours; however, at present the sensitivity is 40%. |
| | |
Authors:
|
Y N Kami; T Chikui; K Okamura; Y Kubota; K Oobu; H Yabuuchi; E Nakayama; K Hashimoto; K Yoshiura |
Related Documents
:
|
15586217 - 18fdg-pet in 733 consecutive patients with or without side-by-side ct evaluation: analy... 18483097 - The cost-effective use of 18f-fdg pet in the presurgical evaluation of medically refrac... 14582127 - Primates as pets in mexico city: an assessment of the species involved, source of origi... 16228237 - 11c-methionine pet for the diagnosis and management of recurrent pituitary adenomas. 16635577 - Caffeine reduces the initial dip in the visual bold response at 3 t. 7620587 - Quantitative magnetic resonance imaging in autism: the cerebellar vermis. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-11-10 |
Journal Detail:
|
Title: Dento maxillo facial radiology Volume: - ISSN: 0250-832X ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
|
Created Date: 2011-11-14 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7609576 Medline TA: Dentomaxillofac Radiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
1Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Graduate School of Medical Sciences, Kyushu University Fukuoka Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Digital subtraction radiography evaluation of longitudinal bone density changes around immediate loa...
Next Document: Diagnostic accuracy of proximal enamel subsurface demineralization and its relationship with calcium...