Abstract
The differential diagnosis of cervical cysts in children includes common entities such as branchial cleft cysts, thyroglossal duct cysts, and cystic hygromas. Congenital thymic cysts are uncommon and often misdiagnosed as either branchial cleft cysts or cystic hygromas. However, they may have an appearance on CT that can be characteristic. The course of the descent of embryologic thymic tissue in the neck to the mediastinum indicates the potential site of deposition of an ectopic cervical thymic cyst. In a child, a cystic lesion that has an intimate relationship to the carotid sheath is likely to be a thymic cyst.
Of the approximately 100 cases of vestigial cervical thymus or thymic cysts that have been reported in children, only 5 cases of a persistent thymopharyngeal duct cyst have been described [1–5]. In two of these five, the persistent thymopharyngeal duct cyst was demonstrated by CT [1, 2]. We report one additional case of a cervical thymic cyst and one case of a persistent thymopharyngeal duct cyst both depicted by CT.
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Boyd, J, Templer J, Havey A, Walls J, Decker J (1993) Persistent thymopharyngeal duct cyst. Otolaryngol Head Neck Surg 109: 135–139
Benson MT, Dalen K, Mancuso AA, Kerr HH, Cacciarelli AA, Mafee MF (1992) Congenital anomalies of the branchial apparatus: embryology and pathologic anatomy. Radiographics 12: 943–960
Zarbo RJ, McClatchey KD, Areen RG, Baker SB (1983) Thymopharyngeal duct cyst: a form of cervical thymus. Ann Otol Rhinol Laryngol 92: 284–289
Tovi F, Mares AJ (1978) The aberrant cervical thymus. Am J Surg 136: 631–637
Lewis MR (1962) Persistence of the thymus in the cervical area. J Pediatr 61: 887–893
Mikal S (1974) Cervical thymic cyst. Arch Surg 109:558–562
Sanusi ID, Carrington PR, Adams DN (1982) Cervical thymic cyst. Arch Dermatol 118: 122–124
Guba AM, Adam AE, Jaques DA, et al (1978) Cervical presentation of thymic cysts. Am J Surg 136: 430–436
Scully RE, Galdabini JJ, McNeely BU (1977) Case 34 – 1977, case records of the Massachusetts General Hospital: weekly clinicopathologic exercises. N Engl J Med 297: 436–442
Bailey LL, Hilde RL, Smith TR (1977) Cervicomediastinal thymic cyst with vocal cord paralysis. Cancer 39: 347–349
Dehner LP, Martin SA, Sumner HW (1977) Thymus related tumors and tumor-like lesions in childhood with rapid clinical progression and death. Hum Pathol 8: 53–66
Ellis HA (1967) Cervical thymic cysts. Br J Surg 54: 17–20
Silverman PM, Korobkin M, Moore AV (1983) Computed tomography of cystic neck masses. J Comput Assist Tomogr 7: 498–502
Harnsberger HR, Mancuso AA, Muraki AS, et al (1984) Branchial cleft anomalies and their mimics: computed tomographic evaluation. Radiology 152: 739–748
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Burton, E.M., Mercado-Deane, M.G., Howell, C.G. et al. Cervical thymic cysts: CT appearance of two cases including a persistent thymopharyngeal duct cyst. Pediatr Radiol 25, 363–365 (1995). https://doi.org/10.1007/BF02021704
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DOI: https://doi.org/10.1007/BF02021704