This document discusses different types of neck masses, including: - Lateral neck masses such as branchial cysts, laryngoceles, and lymphangiomas. - Midline masses like thyroglossal duct cysts, thymic cysts, and dermoid cysts. - Masses that can occur anywhere in the neck including hemangiomas and lymphatic malformations. - It provides more detail on thyroglossal duct cysts, thymic cysts, and sublingual dermoid cysts including their presentation, diagnosis, and treatment.

1. GROUP C5
SUPERVISOR: DR YAHIYA

2. NECK MASSES
 Anatomy
 Lateral neck masses
○ Branchial cyst
○ Laryngocele
○ Pseudotumor of infancy
○ Cystic Hygroma
○ Lymphangioma
 Midline
○ Thyroglossal duct cyst
○ Thymic cyst
○ Dermoid cyst
 Entire neck
○ Hemangioma
○ Lymphatic malformation
 Malignant
 Lymphoma
 Leukemia
 Sarcoma

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.

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.

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