Presentation
Infant with mass in the left neck.
Patient Data
Age: 6 months
Gender: Male
From the case:
Ectopic thymus
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Large left neck mass anterior to the carotid/jugular vessels and adjacent to left sternocleidomastoid muscle in the submandibular region. It extends from the upper neck to the mid neck region.
Case Discussion
An infant with a mass in the left neck thought initially to be torticollis. On MRI, the tissue signal intensity is that of the mediastinal thymus. Ectopic thymus tissue involutes in childhood just as normal thymus tissue does.