Head and Neck Clinical Embryology Flashcards
Thyroglossal diverticulum movement
migrates towards head, passes beneath hyoid and laryngeal cartilages
During migration, the thyroid remains contacted to the ___________by the ____________
tongue
thyroglossal duct
Pharyngeal fistula occurs when
Pharyngeal pouch 2 and pharyngeal groove 2 persist
Pharyngeal cyst occurs when_________ and is found by__________
Pharyngeal grooves 2-4 persist
angle of mandible
Thyroglossal duct cyst offucs when________
thyroglossal duct persists and and forms a cyst
DiGeorge
3-4, Absence of parathyroid glands/thymus T cell deficiency- no thymus Hypocalemia/tetany recurrent infxn
Orofacial clefting involves neural crest cells and results in___1 &2_______ is__________ and is based on_________________(4 things)
- the maxillary prominence fails to fuse with the medial nasal prominence
- The underlying mesoderm and neural crest fail to expand resulting in persistent labial groove
- Most common craniofacial birth defect
- Based on embryological formation, etiology, candidate genes, recurrence risks
Cleft palate classified as (3)
anterior- when the palatine shelves fail to fuse with primary
posterior- occurs when the palatine shelves fail to fuse with each other and with nasal septum
anteroposterior- occurs when combo of defects
Cleft palate occurs at what frequency
1:2500
When you stick out your tongue, what moves, thyroglossal duct cyst or thyroid tumor
duct cyst
Will dermoid cysts move while swallowing?
NO, attached to skin, not cartilage
Dermoid cysts are ________ and are lined with _____________
congenital
squamous epithelium
Does condroma move with swallowing
no
5 concerning things in posterior triangle
Cervical LN Supraclavicular LN Cystic Structures External Jugular 3 trunks of brachial plexus
Virchows node is a strong indicator of
Abdominal CA (lft)
