Thyroid and Parathyroid Flashcards
Superior thyroid is from
External caratoid
Inferioir thyroid artery is from
Thyrocervical trunk
Thyroidea ima artery is from
Innominate or aora
Recurrent nerves are vulnerable to injury where
Ligament of bery
Relation of thyroid to trachea
Posterior
Simon’s triangle contains what?
Recurrent laryngeal nerve
Difficulty high notes is due to injury jn
External branch of superior laryngeal nerve
Only motor NS to cricothyroid
External branch of superior laryngeal nerve
Used for imaging of lingual thyroid
Iodine 123
Higher risk for malignancy? Cold or wam lesions?
Cold: 20%
Diagnostic for large, fixed substernal goiters
CT/MRI
Diffuse distribution and elevated uptake of iodine 123
Grave’s
Antithyroid drug associates with congenital aplasia
Methimazole
Size of small goiter not requiring iodine 131
<40g
Near Total thyroidectomy involves leaving behind of how many grams of thyroid tissue
4-7 gms
Wermer syndrome
Men 1
Sipple syndrome
Men 2A
Mgmgt for anplastic Ca
Thyroidectomy
Mgmt for thyoird lymphoma
CHOP regimen, cyclophosphamide, doxorubicin
Most common malignancy that metastasize to thyroid
Renal
Cyst formation in hyperparathyroidism
Osteitis fibrosa cystica
Dorsal to RLN ? Superior or inferior?
Superior; inferior is ventraly
Most common location of ectopic parathyroids
Paraesophageal
Sestamibi
Preoperative localization test for parathyroid
Mgmgt for parathyroid hyperplasia
Autotransplantation; 3 1/2 parathyroidectomy or total
Mgmt for parathyroid carcinoma
En bloc resection + ipsilateral thyroid lobe
Mgmt for seconday hyperparathyroidism
Just like hyperplasiat
2ndary hyperparathyroidism is usually related to
Chronic renal failure
Wt o thyroid
20g
