Rare incidence of mucosa-associated lymphoid tissue lymphoma presenting as buccal fat pad tumor: A case report

Figure 1 Simple computed tomography image. A 30-mm large soft tissue shadow with well-defined margins was observed anteriorly in the left masseter muscle.

Figure 2 Magnetic resonance images. A: T1-weighted magnetic resonance images; B: T2-weighted magnetic resonance images. A 30-mm large mass with well-defined margins was observed in the buccal fat body anterior to the left masseter muscle; both T1 and T2 are nonspecific, with moderate signals. No continuity with the parotid glands is noted.

Figure 3 Histological assessment. A: Hematoxylin and eosin staining (× 400). Small to medium-sized lymphocytes of relatively homogeneous morphology were densely proliferating with indistinct follicle-like structures; B: Immunostaining (× 400). Cells are CD20-positive.

Figure 4 Preoperative and intraoperative images. A: Preoperative skin incision line. B: Intraoperative findings. The arrow indicates the tumor. No continuity between the tumor and parotid glands was observed.