2020-3 / JANUARY 20 (CONTRIBUTORS: STEPHANIE J. CONRAD, MING ZHOU)
A 39-year old male presented with a painful slowly enlarging left testicle with mass. A left radical orchiectomy was performed.
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1. What is the correct diagnosis?
a. Malignant mesothelioma
b. Adenomatoid tumor
c. Metastatic adenocarcinoma
d. Yolk sac tumor
2. Which of the immunohistochemical stainings, when positive, supports the diagnosis?