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2020-18 / May 4 (Contributor: Stephen Rohan) |
The patient in his 40s presented with a complaint of a right testicular mass. Ultrasound revealed a 2.0 cm cystic mass. Serum tumor markers (HCG, AFP, LDH) were all normal. Positive immunohistochemical stains are shown. Additional stains performed (all negative) included CK5/6, calretinin, and OCT4. |
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Quiz |
1. What is the correct diagnosis? a. Mesothelial hyperplasia b. Malignant mesothelioma c. Serous borderline tumor / atypical proliferative serous tumor of the para-testis d. Metastatic carcinoma e. Embryonal carcinoma |