1. Which of the following is the most common location for metastatic neoplasms?

2. A 70-year-old male undergo cystoscopy for intermittent hematuria. Based on the histologic findings in the images below, what is the best diagnosis?

3. A 50 year old male presents with a breast mass.  Based on the following images representative of the histology and immunohistochemistry, what is the best diagnosis?

4. A 65 year old male is noted to have a retroperitoneal mass by imaging.  Based on the morphology and images below, what is the best diagnosis?

5. A cystoscopy was performed on a 70-year-old male who was found to have a marbled to golf ball sized lesion in the bladder. A transurethral resection was performed, and the slides along with the appropriate immunohistochemical stains are shown. Based on the findings, what is the best diagnosis?