Ectopic cervical thymic cyst in a seven year old: a diagnostic challenge

Area of Science:

• Pediatric Surgery
• Head and Neck Pathology
• Congenital Anomalies

Background:

• Cervical thymus cysts are rare neck masses that pose diagnostic challenges due to their resemblance to lymphangiomas and branchial cleft cysts.
• These cysts typically present as painless, progressively enlarging masses, with a slight male predominance and a predilection for the left side of the neck.

Observation:

• A case report details a seven-year-old child presenting with a right-sided neck swelling.
• The swelling exhibited increased size during phonation, adding a unique complexity to the clinical presentation.

Findings:

• Surgical excision was performed for the pediatric neck mass.
• Final histopathology definitively identified the mass as an ectopic thymic cyst.

Implications:

• This case underscores the importance of considering ectopic thymic cysts in the differential diagnosis of pediatric neck masses.
• The unusual presentation (right-sided, phonation-dependent) emphasizes the need for thorough diagnostic evaluation to overcome the challenges posed by rare cervical lesions.