This is a 62-year-old man has history of 3 carcinomas: 2006 high-grade urothelial carcinoma (transitional cell carcinoma), 2008 papillary thyroid carcinoma, 2009 prostate carcinoma (on prostatectomy it showed gleason 5, 4, and 3 patterns). He had cystectomy, prostatectomy, and thyroidectomy. This FNA was done under the CT, it is positive for malignancy. Can you pick which primary carcinoma now is metastasized?

This should be a easy case. Please just look at the morphology carefully.

I know that a lot of you like the H&E stain, the first 2 photos are H&E stain, the last 2 are Pap stain, I hope you can appreciate the difference.