Diagnostic challenges and multidisciplinary management of primary adenosquamous carcinoma of the liver: A case report and review of literature

Figure 4 Pathological images of adenosquamous carcinoma in lymph node metastasis. The adenocarcinoma component of the tumor has tubular structures, and the cells show a nest-like arrangement (squamous cell carcinoma component). A-C: Positive staining of cytokeratin (CK) 5/6, CK7 and CK19 shows brown and granular deposits in the cytoplasm (× 100); D: Positive staining of protein 40 shows brown and granular deposits in the nucleus (× 100); E and F: The tumor showed atypia, mitosis, solid nests, and tubular structures (hematoxylin and eosin stain, × 100); G and H: Negative staining of glypicnn-3 and hepatocytes in tumor cells (× 100). CK: Cytokeratin; P40: Protein 40; HE: Hematoxylin and eosin.