Thyroglossal duct cyst

The most common congenital cystic midline neck mass

benign cyst that can arise anywhere along the embryonic path of descent of the thyroid gland (from the foramen cecum to the level of the thyroid)

presents with a mobile, nontender midline mass at the level of thyroid cartilage that can fluctuate in size

may become infected leading to rapid enlargement and tenderness

Tx

Sistrunk procedure excises the cyst and the middle of the hyoid bone along with the thyroglossal duct tract

Different Diagnosis of lump in Posterior Neck Triangle

1. Cystic hygroma

2. Bronchial sinus and cyst

3. Pancoast Tumour

4. Cervical Rib

Cystic Hygroma

congenital malformation of lymphatic tissue

commonly present in the lateral neck and are composed of multiple cystic spaces of various sizes

Dermoid cyst

congenital neck mass

more commonly found in submental area (other sites - orbit, nose, nasopharynx, and oral cavity)

consists of epithelium-lined cavites filled with skin appendages

Lymphadenitis