2.2 THYROGLOSSAL DUCT CYSTS (Fig above)
The cyst occurs in the midline in the neck and originates fromthe remnant of the thyroglossal duct. It marks the path of
descent of the thyroid from the foramen caecum of the tongue.
The cyst appears when the duct or a part of it fails to disappearduring development.
Presents as a painless lump in the midline which moves ondeglutation and on protrusion of the tongue.
Treatment is Surgical Excision.
2.3 BRANCHIAL CYST (Pharyngeal pouch remnant)
Presents as a lump anterior to the sternomastoid in upper third but may be lower.
It presents between 20-30 years rarely in
childhood it is fluctuant and transilluminant. It sometimes gets infected and a sinus appears in the neck.
Sometimes rarely there is an internal opening resulting in a fistula.
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