Pure squamous cell carcinoma of the gallbladder locally invading the liver and abdominal cavity: A case report and review of the literature

Figure 3 Hematoxylin and eosin staining of tumor cells. A: Image showing diffuse growth replacing the mucosa and invading the muscularis propria; B: Image showing densely packed tumors formed by squamous cells; C: Image showing squamous cell carcinoma with keratin pearl formation; D: Image showing that tumor cell proliferation is markedly atypical, and karyokinesis is increased.