PMC5390533_01
Chest X-ray shows left mediastinal mass.
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Nevertheless, his chest X-ray showed left sided chest mass (Figure 1).
CT of abdomen and pelvis shows the retroperitoneal masses.
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There were also retroperitoneal masses measuring in combination 15 x 15 cm extending from upper abdomen down to the level of aortic bifurcation and associated with significant bilateral hydronephrosis and hydroureters (Figure 2).
Hematoxylin and eosin (H&E) examination of the core needle biopsy of the mediastinal mass (x20).
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The cells show enlarged nuclei and abundant eosinophilic cytoplasm with focal necrosis and scattered mitoses (Figure 3).
Immunohistochemical examination of the mediastinal mass core needle biopsy using the Prostate Specific Antigen (PSA) stain (x20).
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Immunohistochemical stains were done and surprisingly showed diffuse and strong positivity for PSA (Figure 4) and CK8/18.