Thymic cysts are rare, benign, cervical or mediastinal lesions. They are considered to be the sequestrated remains of the thymopharyngeal duct structure. They can be located in any position along the normal descent route of the thymus gland, i.e., from the mandible angle, through the lateral neck, up to the sternal notch, with half of them extending into the anterior mediastinum [[1], [2]]. The diagnosis is usually made postoperatively, based on histological examination of the excised specimen. Complete surgical removal remains the treatment of choice. We present a case of an extreme-sized cervicomediastinal cystic lesion only postoperatively definitively diagnosed as a thymic cyst.
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Petropoulos I, Konstantinidis I, Noussios G, Karagiannidis K, Kontzoglou G.
Thymic cyst in the differential diagnosis of paediatric cervical masses.
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