PMC6462376_01
A) carcinoma infiltration in solid islands wiping the lymph node structure; B) diffuse and strong pankeratin positivity in carcinoma cells; C) extensive infiltration in the bone marrow, presenting a diffuse pattern, consisting of cells in large centroblastic morphology; D) extensive and strong CD20 expression in the bone marrow infiltration
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B cell lymphoma resembling diffuse large B cell lymphoma (Figure 1 (A, B)). Body 18Fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) performed for staging revealed following lymphadenopathies: 1.3x0.8cm-sized at the right parotid gland inferior (SUVmax: 11.8), right inferior jugular area (SUVmax: 13.1), and 2x1.5 cm-sized (largest) (SUVmax: 6.8) in the right deep cervical location. The lymph node biopsy result showed breast cancer metastasis (Figure 1 (C, D)).