Tumor morphology. A&B. Luminal/tubular epithelial-like morphology. Tubules lined by single or multiple layers of pleomorphic epithelial cells. (arrow) (A-H&E, ×200 ; B- H&E, × 400). C. Lobules separated by stroma (arrow). H&E, ×100 D.A lobule surrounded by stoma (arrow). H&E, ×200. E&F. Tumor mass pushing the adjacent dermis, H&E, ×200.G&H. Neutrophils invading the necrosed areas in the tumor mass (arrow). H&E, ×200. I&J. Neoplastic epithelial cells with hyperchromatic nucleus invading the underlying muscle layers (arrow)(I-H&E, ×100; J- H&E, × 200).