Flashcards in Thyroid Gland Deck (17):
Blood supply for superior thyroid?
Blood supply for inferior thyroid?
Venous drainage for superior thyroid?
Internal Jugular Vein
Venous drainage for middle thyroid?
Internal jugular vein
Venous drainage for inferior thyroid?
In up to 12% of individuals, a small midline artery, called the Thyroidealma artery, arises from the aortic arch or brachiocephaloc trunk and reaches the thyroid isthmus inferiorly
First endocrine gland to develop; 24 days after fertilization
Median endodermal thickening in the floor of the primordial pharynx - forms a small outpouching-thyroid diverticulum
As the embryo and tongue grow, the developing thyroid gland descends in the neck
The developing thyroid gland is connected to the tongue by a narrow tube, thyroglossal duct
Normally thyroglossal duct atrophies & disappears, but a remnant may persists forming a cyst
Painless, progressively enlarging movable mass; asymptomatic unless becomes infected
Following infection - perforation of the skin forming a thyroglossalduct sinus that opens in the median plane of the neck
Thyroglossal duct cyst and sinus
Abnormal communication between the trachea and esophagus
Associated with esophageal atresia
Results from improper division of the foregut by the tracheoesophageal septum
Tube is inserted between the cricoid & thyroid cartilages
Vertical incision is made through the ff structures: skin, superficial fascia, investing layer of deep cervical fascia, pretracheal fascia, larynx
Complications of thyroidectomy
Thyroid storm (hyperpyrexia & tachyarrhythmia)
Damage to recurrent or superior laryngeal nerve
Anywhere along the path of embryonic descent from the base of the tongue (foramen cecum) to the superior mediastinum
Aberrant thyroid tissue
Midline of the neck
Cystic remnant of the thyroid descent
Thyroglossal duct cyst
Superior suspensory ligament of the thyroid gland
Located adjacent to the cricoids cartilage
Ligament of Berry
The ff though the tracheoesophageal groove
R recurrent laryngeal nerve (around subclavian artery)
L recurrent laryngeal nerve (recurs around the arch of aorta at the Ligamentum arteriosum)
Superior thyroid veins
Middle thyroid veins
Inferior thyroid veins
Internal jugular vein