A collision tumor of buccal squamous cell carcinoma and diffuse large B-cell lymphoma: a case report and literature review
Background Collision tumors are rare entities in which two histologically distinct malignancies coexist in close proximity without histological admixture or transition. The coexistence of buccal squamous cell carcinoma (SCC) and diffuse large B-cell lymphoma (DLBCL) in the oral region is exceptionally uncommon. Because...