Name : Morteza
Family :Sanei Taheri
Resident : Samira Shahhamzei
Gender : Male
Age : 30
Head & Neck Imaging
A 30 Y/O man with neck mass
Imaging Procedures and Findings
Axial and coronal MRI shows a left paramidline infrahyoid mass with low intensity signal in T1WI and high intensity signal in T2WI in glottic and supraglottic level. There is no enhancement after GAD.
The most common benign congenital masses of the neck in children include thyroglossal duct cysts (TDCs) . TDCs typically present In the first 5 years of life. The cysts are more commonly found in the Caucasian population, with males and females equally affected. Unless complicated by infection, patients typically present with a nontender, mobile, 2- to 4-cm, subcutaneous midline or Para median neck mass of variable firmness. TDCs are classified by location as infrahyoid (65%), suprahyoid (20%), and at the level of the hyoid (15%). The primary differential considerations of TDC by imaging include dermoid/epidermoid cyst, branchial cleft cyst (if TDC is paramedian in location), or rarely, sebaceous cyst. TDC appears as a mass of relatively decreased attenuation to muscle with variable rim enhancement on CT . On MRl, uncomplicated cysts have variable Tl weighted signal, ranging from hypointense to hyperintense (proteinaceous material), and hyperintense T2-weighted signal, with no enhancement . Most suprahyoid cysts are midline, whereas cysts below the level of the hyoid are almost always embedded in a strap muscle ("claw sign"). Cysts at the level of the hyoid are midline, lying just anterior to the hyoid bone.
Thyroglossal duct cyst
Haaga John R. CT And MRI of Whole Body ,5th edition. P695-696