Ectopic cervical thymus in an infant.
Radiat Med
; 24(6): 452-5, 2006 Jul.
Article
in En
| MEDLINE
| ID: mdl-16958427
ABSTRACT
We report a case of accessory cervical thymus presenting as a unilateral neck mass in a 2-month-old boy. Ultrasonography (US) showed a mass isoechogenic to muscle in the left neck. Computed tomography (CT) revealed a well-defined, mildly enhanced mass located anterior to the sternocleidomastoid muscle, anterolateral to the carotid sheath, and posterior to the submandibular gland. On magnetic resonance imaging (MRI), the mass was isointense to muscle on T1-weighted images and hyperintense to muscle on T2-weighted images. Diffusion-weighted images showed relatively low apparent diffusion coefficient (ADC) values, and the mass was slightly enhanced after administration of contrast material. We suspected ectopic thymus, but we could not exclude the possibility of a malignant lesion. Therefore, the tumor was surgically resected. The histological diagnosis was ectopic cervical thymus. Ectopic thymus should be included in the differential diagnosis of a submandibular or cervical mass in infants. US and MRI can provide useful information for the diagnosis of ectopic cervical thymus.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Thymus Gland
/
Choristoma
/
Neck
Type of study:
Diagnostic_studies
Limits:
Humans
/
Infant
/
Male
Language:
En
Journal:
Radiat Med
Journal subject:
DIAGNOSTICO POR IMAGEM
/
MEDICINA NUCLEAR
/
NEOPLASIAS
/
RADIOTERAPIA
Year:
2006
Document type:
Article
Affiliation country:
Japan