Thymic cysts of the neck - Case reports and literature review

Thymic cysts of the neck are rare clinical entities. Only 45 children with cervical thymic cysts have been reported in the literature so far; 2 more cases are reported here. Both presented as cystic swellings in the left side of the neck and were pre-operatively diagnosed as a cystic hygroma and a solitary thyroid nodule. Investigations included blood counts, ultrasonograms, thyroid scans, and aspiration cytology. Both lesions could be easily excised by the cervical route. The final diagnosis was made only after histopathological examination. The relevant literature on the aetiology, pathology, clinical features, and treatment is reviewed.