1. 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?

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

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?