Mantle cell lymphoma: primary oral presentation.

Mantle-cell lymphoma is an uncommon lymphoid malignancy of B-cells. It is often aggressive and prognosis is poor. A 69-year-old gentleman with a history of ischaemic heart disease was referred from primary care with a painless right floor of mouth swelling that had been present for 1 month. He otherwise completely asymptomatic. Incisional biopsy of the lesion was undertaken and marker studies demonstrated mantle cell lymphoma. Positron emission tomography–computed tomography and bone marrow biopsy showed widespread but low volume involvement. The patient was referred to the haematology multidisciplinary team for further assessment and treatment.