PMC7543121_01
A (a) 4x low magnification and (b) 20x high magnification image of the pathologic specimen demonstrating the atypical glandular epithelium floating in pools of extracellular mucin, consistent with a mucinous adenocarcinoma.
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The lesion consisted of atypical glandular epithelium floating in pools of mucin, consistent with a mucinous adenocarcinoma (Figure 1(a) and (b)).
Immunohistochemical staining of the pathologic specimen, demonstrating positive staining for (a) CK-7, (b) CK-20, and (c) CD-X2.
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The tumor was immunoreactive for cytokeratin-7 (CK-7), cytokeratin-20 (CK-20), and caudal type homeobox 2 (CD-X2) (Figure 2(a)-(c)).
Immunohistochemical staining of the pathologic specimen, demonstrating negative staining for (a) PSA and (b) PSAP.
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To better understand the origin of the tumor, immunostains for racemase, PSA, and prostatic specific acid phosphatase (PSAP) were performed (Figure 3(a) and (b)).