3. Thyroglossal cyst
Arises from remnants of the
duct left by descent of the
developing thyroid gland
Present anywhere along the
thyroid anlage’s descent
Most often located at the
hyoid level (in the
midline/slightly off the
midline often to the left)
4. Thyroglossal Duct Cyst
Cystic midline swelling affect young children
Rounded with a diameter of 2-4cm
Increase in size with URTI
Move with tongue protrusion due to attachment
of thyroglossal duct to foramen caecum at base
of tongue.
Rarely carcinoma develop in cyst
Tx: (Sistrunk’s operation) Complete surgical
excision including body of hyoid bone and core
of tongue tissue around suprahyoid tongue base
to foramen caecum.
5.
6. Thymic Cyst
Thymus develop from 3rd pharyngeal pouch
and descend to neck to the mediastinum.
Thymic remnants may persist anywhere in its
path from angle mandible to midline of neck.
Swelling either cystic or solid.
Can occur in children or adults by presents of
anterior neck mass and deep to middle SCM.
Rare condition
Tx: Surgical excision + sternotomy if extend
into mediastinum.
7.
8. Sublingual Dermoid Cyst
Midline submental swelling but does
NOT move on protrusion of tongue.
Can be arises from floor of mouth and
need to be diffrentiated with ranula.
Tx: Surgical excision