Primary hepatic adenoid cystic carcinoma: A case report and review of literature

Figure 5 Immunohistochemical findings. A: Cytokeratin 7 showed diffuse membranous positivity, supporting a glandular epithelial origin, × 100; B: Cluster of differentiation 117 demonstrated cytoplasmic and membranous positivity, a characteristic immunophenotype of adenoid cystic carcinoma, × 100; C: P63 exhibited nuclear positivity, indicating the presence of myoepithelial cells, × 100; D: The Ki-67 proliferation index was approximately 20% in the tumor cells, suggesting moderate proliferative activity, × 100. The immunohistochemical profile (cytokeratin 7+, cluster of differentiation 117+, p63+) is consistent with the diagnosis of adenoid cystic carcinoma.