INTRODUCTION: Oral squamous cell carcinoma (OSCC) is the commonest malignancy in the oral cavity. It is influenced by genetic modifications; as well as numerous environmental factors, such as smoking, tobacco chewing, alcohol consumption, infection by oncogenic viruses, and low intake of fruits and vegetables. CD105 has been introduced as a marker for angiogenesis which stains vessels that are in the proliferating stage. Ki-67is a nuclear protein that is recognized as a nuclear antigen present in proliferating cells, but absent in resting cells. OBJECTIVES: To evaluate and correlate the expression of Ki-67 and CD105 in different histopathological grades of OSCC. MATERIALS AND METHODS: Immunohistochemical (IHC) study using the Ki-67 and CD105 antibody was done on 20 surgical specimens and 5 normal mucosal tissues taken from OSCC patients and healthy individuals respectively. RESULTS: Remarkable improvement in the histology and the ultrastructure of the alveolar bone of rats in Group III was observed. Moreover, hematological values revealed significant decrease in the inflammatory condition of rats with induced RA after fish oil treatment. CONCLUSIONS: Ki-67 and CD105 are expressed in OSCC biopsies. Additionally, the fraction of Ki-67positive tumor cells (the Ki-67 labeling index) is often correlated with the clinical course of OSCC. CD105 microvessel density can be a useful factor for predicting the course of oral squamous cell carcinoma
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