MKI67 and diffuse large B-cell lymphoma: The microscopic appearance corroborated with the immunohistochemical aspect of positive lymphoid population for CD10, CD20, and KI67 and a negative expression of BCL2 indicates a Burkitt lymphoma, allowing its differentiation with diffuse large B-cell lymphoma and non-classifiable B-cell lymphoma with intermediate aspects between diffuse large B-cell lymphoma and Burkitt lymphoma.