case_images: PMC6535821_01
case_images: Cardiac MRI showing mass in lateral wall of the left ventricle on T1 and T2 imaging.
case_images: CRIHEM2019-7690430.001.jpg
case_images: PMC6535821_01_CRIHEM2019-7690430.001.jpg
case_images: fig1
case_images: MRI was performed and showed a large mass, involving right ventricular (RV) lateral wall with a maximum thickness of 3 cm. Mass was hyperintense to myocardium on T2 and isointense on T1 (Figure 1).
case_images: (a) H&E section of cardiac biopsy showing diffuse infiltration of large cells. (b) Immunohistochemistry staining positive for CD20.
case_images: CRIHEM2019-7690430.002.jpg
case_images: PMC6535821_01_CRIHEM2019-7690430.002.jpg
case_images: fig2
case_images: Immunohistochemistry (IHC) markers on the mass were positive for CD45, CD20, PAX-5, BCL2, BCL6, and MUM-1 and negative for CD5, CD10, and cyclin D1 (Figure 2).
case_images: PET scan showing (a) increased FDG uptake in the cardiac tissue and (b) no extra cardiac FDG uptake.
case_images: CRIHEM2019-7690430.003.jpg
case_images: PMC6535821_01_CRIHEM2019-7690430.003.jpg
case_images: fig3
case_images: The PET scan showed increased FDG (F-18 fluorodeoxyglucose) uptake in right atrium, right ventricle, and left ventricle with no abnormal uptake outside of the heart (Figure 3).