30 Questions
Which of the following is a result of persistence of remnants of the ultimopharyngeal body?
Piriform Sinus Fistula
Where are lateral cervical cysts usually found?
On the lateral aspect of the neck directly anterior to the sternocleidomastoid muscle
What is a common feature of external cervical sinuses?
They are usually bilateral and commonly associated with auricular sinuses
What causes the formation of a thyroglossal fistula?
Rupture of a cyst
In which region does an internal branchial fistula usually open?
In the tonsillar region
What is common in Treacher Collins Syndrome?
Cleft palate and defects of the eyes and ears
What is a characteristic feature of Pierre Robin Syndrome?
Triad of micrognathia, cleft palate, and glossoptosis
What is a result of disruption of crest cell development?
(Mandibulofacial Dysostosis) Treacher Collins Syndrome
Where may a thyroglossal cyst be found?
(Median Plane Of The Neck Just Inferior To The Hyoid Bone)
What results from insufficient migration of neural crest cells into the first arch during the fourth week?
(First Arch Syndrome) Various Birth Defects Of The Eyes, Ears, Mandible, And Palate
What can lead to Pierre Robin Syndrome?
Environmental factors
What is typical in an isolated mass of thymic tissue persisting in the neck?
(Accessory Thymic Tissue)
Which of the following is true about thymic tissue?
It may remain in the neck due to migration
Where are the inferior parathyroid glands sometimes found?
At the bifurcation of the common carotid artery
What is a common site for ectopic thyroid tissue?
Near or within the thyroid gland or thymus
Which statement about ectopic parathyroid glands is true?
They can be found near or within the thyroid gland or thymus
Why are accessory glands or remnants of tissue found along the pathway of pouches?
Due to normal migration
What is true about the migration of glandular tissue derived from pouches?
It undergoes migration
Where can inferior parathyroid glands be more variable in position than superior ones?
At the bifurcation of the common carotid artery
What is a common location for thymic tissue to persist?
In the neck region
What is the initiating defect in DiGeorge Syndrome?
Small mandible (micrognathia)
Which defect is characterized by congenital hypoparathyroidism and increased susceptibility to infections?
DiGeorge Syndrome
What results from the breakdown in signaling between pharyngeal endoderm and adjacent neural crest cells?
Ectopic glandular tissue
What is a common birth defect of the mouth in DiGeorge Syndrome?
Shortened philtrum of upper lip
Which condition is a result of a failure of the 3rd & 4th branchial pouches to develop into the thymus and parathyroid?
DiGeorge Syndrome
What is characteristic of ectopic glandular tissue found in DiGeorge Syndrome?
Congenital hypoparathyroidism
What causes the formation of a thyroglossal fistula?
Persistence of remnants of the ultimopharyngeal body
What can lead to Pierre Robin Syndrome?
Insufficient migration of neural crest cells into the first arch during the fourth week
Where are lateral cervical cysts usually found?
Lateral neck
What is common in Treacher Collins Syndrome?
Birth defects of the mouth (shortened philtrum of upper lip)
Test your knowledge of the developmental disorders involving the pharyngeal region with this quiz. Learn about ectopic thymic and parathyroid tissue, and understand glandular tissue migration and persistence.
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