eMedicine Specialties > Otolaryngology and Facial Plastic Surgery > Head & Neck Surgery
Neck, Cysts: Follow-up
Updated: Aug 5, 2009
Outcome and Prognosis
With no history of infection or prior surgery, the recurrence rate after operating on a branchial cleft anomaly is approximately 3%. The recurrence rate increases to approximately 20% after prior unsuccessful attempts at surgical removal. The recurrence rate associated with simple excision of a thyroglossal duct cyst (TGDC) is approximately 50%. The recurrence rate with a formal Sistrunk procedure is approximately 5%.
Future and Controversies
Branchial cleft anomalies
The risk of malignancy arising from a branchial cleft cyst has been a topic of debate for years. Von Volkmann first described branchial cleft cyst carcinoma in 1882; however, the consensus today is that branchial cleft carcinoma rarely, if ever, occurs.
In 1950, Martin et al reviewed the literature and rejected all of the previous reports of branchial cleft cyst carcinoma.4 They proposed that most of these patients had a metastatic squamous cell carcinoma cyst from an undiagnosed primary lesion. Before diagnosing a patient with a branchial cleft cystic carcinoma, the patient must meet the following criteria:
- The cystic tumor must be located along the line from anterior to the tragus, downward along the anterior border of the sternocleidomastoid muscle, to the clavicle.
- Histologic examination reveals cancer developing in the wall of an epithelial-lined cyst. Transition from benign cyst epithelium to squamous cell carcinoma along the wall of the cystic cavity is evident.
- The patient must have survived at least 5 years without developing any other lesions that could possibly be the primary tumor.
In 1979, Batsakis estimated that, even when including questionable cases of branchial cleft carcinoma, the incidence of branchial cleft carcinoma is approximately 0.3% of all malignant head and neck neoplasms.5 On the other hand, metastatic cystic lymph nodes are quite common; therefore, patients with cystic carcinoma in the neck are assumed to have carcinoma metastatic to cervical lymph nodes from an unknown primary site.
Thyroglossal duct cysts
Literature regarding carcinoma arising from a thyroglossal duct cyst (TGDC) does not share the same controversy as reports of branchial cleft cyst carcinoma. In 1925, Ashurst and White first reported a case of carcinoma arising in a thyroglossal duct remnant.6 Since that time, more than 100 cases have been reported, with the overall incidence of TGDC cancer being less than 1%. For unclear reasons, cancer in a TGDC is more common in females than in males. The diagnosis of carcinoma arising in a TGDC is usually made histologically only after the tumor has been removed.
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References
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Further Reading
Keywords
neck cysts, branchial cleft cysts, branchial anomalies, thyroglossal duct cysts, TGDC, neck masses, congenital neck masses, metastatic squamous cell carcinoma, acquired laryngoceles, cystic schwannomas, lymphatic malformations, benign inflammatory lesions, thyroid gland anomalies, lymphangioma, cystic hygroma, macrocystic lymphatic malformations
Follow-up: Neck, Cysts