SURG 7 Flashcards
CJ, a 5-year-old male, was brought for consultation by his mother because of a slow growing, smooth, well defined, nontender mass at the anterior neck that moves with protrusion of the tongue. He has no other symptoms. What is the diagnosis?
A. Thyroglossal duct cyst
B. Lingual thyroid
C. Ectopic thyroid
D. Pyramidal lobe
A. Thyroglossal duct cyst
What is the projected 10-year survival rate of a patient diagnosed with papillary thyroid malignancy?
A. 65%
B. 75%
C. 85%
D. 95%
D. 95%
What is the risk of malignancy for cold thyroid nodules seen in scintigraphy scan?
A. 20%
B. 30%
C. 40%
D. 50%
A. 20%
Which of the following is suggestive of parathyroid carcinoma?
A. A palpable neck mass
B. An elevated serum calcium level greater than 14 mg/dL
C. An elevated PTH level greater than 5x the normaL
AOTA
What is the most widely used and accurate modality for detection of parathyroid adenomas?
A. Sestamibi scan
B. CT scan
C. MRI
D. Ultrasound
A. Sestamibi scan
Which establishes the diagnosis of primary hyperparathyroidism?
A. Elevated serum calcium with hypercalciuria
B. Elevated serum calcium without hypercalciuria
C. Elevated serum calcium with hyperkalemia
D. Elevated serum calcium with hypokalemia
B. Elevated serum calcium without hypercalciuria
Intraoperative rapid PTH assays provide guidance that all hyperfunctioning glands have been removed during parathyroidectomy. What criterion is used to indicate satisfactory resolution of the hyperparathyroidism during the procedure?
A. Greater than 50% fall in PTH level within 10 min of removal of parathyroid tissues
B. Greater than 25% fall in PTH level within 30 min of removal of parathyroid tissues
C. Greater than 90% fall in PTH level within 30 min of removal of parathyroid tissues
D. Greater than 25% fall in PTH level within 10 min of removal of parathyroid tissues
A. Greater than 50% fall in PTH level within 10 min of removal of parathyroid tissues
Which is TRUE regarding the blood supply of the thyroid gland?
A. Superior thyroid artery is a branch of the internal carotid artery which divides into anterior and posterior branches
B. The inferior thyroid artery is derived from the thyrocervical trunk
C. The thyroidea ima artery consistently courses beside the recurrent laryngeal nerve
D. The inferior thyroid veins drain directly into the internal jugular veins
B. The inferior thyroid artery is derived from the thyrocervical trunk
The recurrent laryngeal nerve arises from the vagus nerve. Which statement is true regarding its course?
A. The left recurrent laryngeal nerve arises from the vagus nerve near the bifurcation of the external and internal carotids, descends towards the aorta and
loops around the ligamentum arteriosum before it ascends medially towards the trachea
B. The left recurrent laryngeal nerve arises from the vagus nerve where it crosses the aortic arch and loops around the ligamentum arteriosum and ascends medially in the neck within the tracheoesophageal groove
C. The right recurrent laryngeal nerve arises from the vagus nerve at the bifurcation of the external and internal carotids, descends towards the subclavian artery and ascends medially within the tracheoesophageal groove
D. The right recurrent nerve arises from the vagus nerve at its crossing with the aortic arch and ascends obliquely towards the trachea
B. The left recurrent laryngeal nerve arises from the vagus nerve where it crosses the aortic arch and loops around the ligamentum arteriosum and ascends medially in the neck within the tracheoesophageal groove
TA, a surgical resident is performing a thyroidectomy for colloid goiter. He is very careful in identifying the recurrent laryngeal nerve (RLN). At what area is the RLN most likely to be injured?
A. At the level of the cricoid cartilage
B. At the tubercle of Zuckerkadl
C. At the ligament of Berry
D. At the most lateral and posterior extent of the thyroid gland
C. At the ligament of Berry
A 4-year-old female came in due to an anterior neck mass which was noticed for a week. The patient had a cough and colds 2 weeks ago. On physical examination, the mass in 2 cm in size and located at the anterior midline, which moves upward upon protrusion of the tongue. Which of the following statements is true regarding her condition?
A. Outright neck dissection should be carried out due to high probability of malignancy
B. A “Sistrunk operation” should be done which consists of removing the mass including the hyoid bone
C. Most common malignancy found in this condition is medullary thyroid cancer
D. Routine thyroid imaging is the necessary diagnostic test to be done
B. A “Sistrunk operation” should be done which consists of removing the mass including the hyoid bone
What condition results from excess of circulating thyroid hormone which leads to an increase in radioactive iodine uptake (RAIU)?
A. Toxic nodular goiter
B. Graves’ disease
C. Riedel’s thyroiditis
D. Increased hormone synthesis
B. Graves’ disease
What is given to a patient to decrease the risk of precipitating a thyroid storm during surgery for Graves’ disease?
A. Propranolol
B. Antithyroid drugs
C. Lugol’s iodine solution
C. Lugol’s iodine solution
What is the treatment of toxic multinodular goiter?
A. RAI
B. Subtotal thyroidectomy
C. Supersaturated potassium iodine solution
D. Antithyroid drug
A. RAI
What is the most common inflammatory disease of the thyroid and leading cause of hypothyroidism?
A. Acute suppurative thyroiditis
B. Subacute thyroiditis
C. Riedel’s thyroiditis
D. Hashimoto’s thyroiditis
D. Hashimoto’s thyroiditis
Which thyroid cancer is associated with radiation exposure?
A. Medullary ca
B. Follicular ca
C. Anaplastic ca
D. Papillary ca
D. Papillary ca
What is the significance of lateral aberrant thyroid?
A. Ectopic thyroid gland
B. Metastatic thyroid cancer
C. Abnormally located thyroid gland
D. Branchial cleft cyst
B. Metastatic thyroid cancer
Most common site of metastases of thyroid carcinoma
A. Lungs
B. Bone
C. Liver
D. Brain
A. Lungs
What is the most important test to determine during the surveillance of a patient who underwent total thyroidectomy for thyroid cancer?
A. T3 and T4
B. Thyroglobulin
C. TSH
D. RAI scan
B. Thyroglobulin
A 50-year-old woman has had an anterior neck mass for the last 10 years. A few months prior to consult, she noticed the mass to increase rapidly in size associated with pain, dysphasia, dysphagia and dyspnea. On physical examination, the mass is 10 cm in diameter and fixed to adjacent structures. Lymph nodes are
palpable. What is the most likely diagnosis?
A. Anaplastic carcinoma
B. Medullary carcinoma
C. Papillary carcinoma
D. Follicular carcinoma
A. Anaplastic carcinoma
Which condition does most lymphomas arise?
A. Hodgkin lymphoma
B. Non-Hodgkin lymphoma
C. Chronic lymphocytic thyroiditis
D. Anaplastic carcinoma
B. Non-Hodgkin lymphoma
A 43-year-old teacher came for consult complaining of dysphagia. On examination there is a 4-cm hard, woody, fixed anterior neck mass. What diagnostic modality should be employed to confirm the clinical impression?
A. Ultrasound
B. Open biopsy
C. FNAB Firm
D. CT scan
Dx: Riedel’s thyroiditis
B. Open biopsy
A law student came in because of a 2.5-cm anterior neck mass for which an FNAB revealed a benign colloid nodule. She denies any symptoms. What will be your medical advice?
A. RAI
B. Repeat FNAB
C. Levothyroxine
D. Surgery
B. Repeat FNAB
A 66-year-old nun sought consult for a 4-cm anterior neck mass. She complains of occasional dysphagia and hoarseness. FNAB was done revealing papillary carcinoma. Ultrasound of the neck showed a 4-cm solitary mass with no cervical lymphadenopathy. What is the clinical TNM stage of the patient?
A. Stage I
B. Stage II
C. Stage IVA
D. Stage IVB
B. Stage II
What is the role of radioactive iodine for differentiated thyroid malignancy?
A. Provides a marked improvement in survival
B. Effectively treats >70% of pulmonary micrometastases that are detected by chest x-ray
C. Reduces recurrence
D. Most sensitive for detecting metastatic disease
B. Effectively treats >70% of pulmonary micrometastases that are detected by chest x-ray
Aside from elevated PTH, which of the following biochemical changes can be found in primary hyperparathyroidism?
A. Low serum Ca++, low urine PO4
B. High serum Ca++, high urine PO4
C. Low serum Ca++, high urine PO4
D. High serum Ca++, low urine PO4
B. High serum Ca++, high urine PO4
A 37-year-old man with papillary thyroid ca 2x2 mass with grade 4 cervical lymphadenopathy. Had a total thyroidectomy. What to do after?
A. Close observation and thyroid hormone therapy
B. Thyroid hormone suppression only
C. Whole body RAI scan
D. Serial serum Tg determination
C. Whole body RAI scan
When all imaging modalities are available, what imaging to obtain for primary hyperparathyroidism?
A. CT scan
B. Ultrasound
C. Sestamibi scan
D. MRI
C. Sestamibi scan
This is TRUE regarding iodine metabolism
A. The average daily dietary iodine intake of 1.0 mg
B. Iodine is converted to iodide and observed into the bloodstream the distal ileum
C. Transport of iodide into the follicles is via an ATP-dependent active transport
D. Plasma iodine clearance is via GIT
C. Transport of iodide into the follicles is via an ATP-dependent active transport
What are the steps in thyroid hormone synthesis in sequence?
A. Oxidation – Iodide trapping – Deiodination – Hydrolyzation – Coupling
B. Iodide trapping – Oxidation – Hydrolyzation – Coupling – Deiodination
C. Iodide trapping – Oxidation – Coupling – Hydrolyzation – Deiodination
D. Oxidation – Coupling – Iodide trapping – Deiodination – Hydrolyzation
C. Iodide trapping – Oxidation – Coupling – Hydrolyzation – Deiodination