Twenty-five patients with thyreoglossal cysts were treated during a 7 years long period. Most of the cysts (in 64 of patients) were typically located between the hyoid bone and the thyreoid gland. The complete Sistrunk’s operation was performed in 40 % of the patients and 48 % patients underwent an extirpation of thyroglossal cyst with a resection of the hyoid bone body. Three of the patients (12 %) suffered a relapse. In one of the patients, this was due to the lateral cyst swapping and in two patients an incomplete extirpation of the ductus thyreoglossus remnant happend. In another patient, an iatrogenic hypothyreossis occurred. To avoid relaps, authors recommend to resect at least 10 mm of the hyoid body and 5 mm of the ductus thyreoglossus remnant behind the hyoid bone.

        Key words: thyreoglossal cysts – Sistrunk’s operation – ductus thyreoglossus