case_images: PMC6348503_01
case_images: Computed tomography (CT) demonstrates irregular thickening of the posterior wall of the (a) bladder and (b) bilateral hydronephrosis. (c) FDG-PET/CT reveals abnormal accumulation in the right iliac internal lymph nodes.
case_images: 10.1177_2036361318825165-fig1.jpg
case_images: PMC6348503_01_10.1177_2036361318825165-fig1.jpg
case_images: fig1-2036361318825165
case_images: U/L), and renal dysfunction (blood urea nitrogen 71.1 mg/dL and creatinine 9.8 mg/dL). Ultrasonography and computed tomography (CT) demonstrated an irregular thickening of the posterior wall of the bladder and bilateral hydronephrosis (Figure 1(a) and (b)). For further investigation, 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET/CT) was performed, revealing abnormal accumulation in the right iliac internal lymph nodes (Figure 1(c)).
case_images: Histopathological findings: (a) medium (magnification 100x) and (b) high power (magnification 400x) images of hematoxylin and eosin staining show infiltration of the bladder wall by diffuse heteromorphic lymphocytes with irregularly shaped nuclei. Tumor cells are positive for the B-cell markers (c) CD20 and (d) LCA (magnification 100x).
case_images: 10.1177_2036361318825165-fig2.jpg
case_images: PMC6348503_01_10.1177_2036361318825165-fig2.jpg
case_images: fig2-2036361318825165
case_images: The tumor cells were positive for the B-cell markers CD20 and LCA on immunohistochemistry (Figure 2).