1. An invasive rapidly growing neck mass was identified in a 75 year old male. The mass was excised, and representative images are shown. IHC for thyroglobulin, chromogranin, and cytokeratins are negative. What is the most likely diagnosis?

2. Which of the following are not found in angiolymphoid hyperplasia with eosinophilia

3. Images from a thyroidectomy are shown. Based on the morphology, what is the best diagnosis?

4. The images for this case come from a 5cm thyroid mass in a 50 y/o female. Based on the findings, what is the best diagnosis?

5. A patient is found to have a laryngeal mass represented by the image for this question. Based on the morphology and lack of PAS staining, which of the following is the best diagnosis:

6. A thyroid mass was found in a 40 year old female. A thyroidectomy was performed and representative images are shown. Which of the following is not likely to be positive in this tumor?

7. A thyroid was removed from a 40 year old female. Grossly, the gland was black, and representative histologic images are shown. Based on the findings, what is the best diagnosis?