Lymphomas are defined as heterogeneous malignancies of the lymphatic system characterized by a proliferation of lymphoid cells or their precursors. Malignant lymphoma of the oral cavity has been described previously although reports on the occurrence of intraoral extranodal T-cell lymphomas are scarce. Oral lesions may appear as a painless enlargement, erythematous, often with surface ulceration secondary to trauma. This is a report of a rare case in which a specific subtype of T-cell lymphoma appeared in the oral cavity.