Question 49 (part 2) · LEK · Thyroid cancer
Which statement is true about medullary thyroid cancer?
1) it forms from the parafollicular C cells;
2) radioactive iodine treatment and TSH suppression with the use of levothyroxine are not applicable in the treatment of this type of cancer;
3) distant metastases are often present at the moment of diagnosis;
4) it may secrete calcitonin, serotonin, ACTH;
5) chronic constipation might be present as a result of hypercalcitoninaemia.
The correct answer is:
2) radioactive iodine treatment and TSH suppression with the use of levothyroxine are not applicable in the treatment of this type of cancer;
3) distant metastases are often present at the moment of diagnosis;
4) it may secrete calcitonin, serotonin, ACTH;
5) chronic constipation might be present as a result of hypercalcitoninaemia.
The correct answer is:
- A. 3,5.
- B. 1,3.
- C. 1,2,4.
- D. only 4.
- E. only 1.
Hint
Recall the cell of origin of this cancer and whether those cells take up iodine or depend on TSH.
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