A 20 year old man complained about neck swelling

 

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Doctor's Information

Name :  Maryam
Family :Noori
Affiliation : ----------------
Academic Degree: ----------------
Email :   This email address is being protected from spambots. You need JavaScript enabled to view it.
Resident :  ----------------

 

Patient's Information

Gender :  Male
Age :  20

 

Case Section

Head & Neck Imaging

 

Clinical Summary

A young man with neck swelling.

 

 

Imaging Procedures and Findings

A 20 year old man complained about neck swelling underwent CT scan with contrast. The study revealed a midline low density (cystic) mass, in front of hyoid bone & partially embedded infrahyoid strap muscles. Rim & internal septa enhancements suggest infection.

 

Discussion

Thyroglossal duct cysts accounts for about 90% of congenital neck lesions and usually are found in children but may be seen in adults. 75% of thyroglossal duct cysts are midline, and most are located at or below the level of the hyoid bone. The infected cysts show peripheral rim of capsular enhancement with occasional septations. Differential diagnoses are: Lingual or sublingual thyroid (ectopic thyroidal tissue) enhances & appears solid on CT or MR imaging. Dermoid or epidermoid of tongue: Dermoid will be fat density on CT, hyperintense on Tl MR, Epidermoid follows water density (CT) & signal (MR), Neither directly involves hyoid bone. Submandibular or sublingual space abscess: odontogenic, submandibular or sublingual gland initial infection, not embedded in strap muscles &Thick enhancing wall around multiple fluid-pus collections are also seen. Mixed laryngocele: can be traced back to laryngeal origin & will not be embedded within strap muscles.

 

Final Diagnosis

Thyroglossal duct cyst.

 

References

Diagnostic Imaging Head & Neck, Harnsberger, et al. Fundamental of diagnostic radiology, William E. Brant, Clyde A. Helms.

 

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