case_images: PMC10500058_01
case_images: Gross view of the left kidney, HE panel, and abdominal enhanced CT scan of the patient. (A) Gross view of the left kidney and ureter; (B) HE panel of the lesion. HE staining showed diffusely proliferating lymphoid tissue, scattered lymphoid follicles with partial atrophy, increased blood vessels between follicles, swelling of endothelial cells, and thickening of the vessel wall with hyaline degeneration. The mantle zone has multiple layers of small lymphocytes arranged in a ring, forming a centripetal ring structure, showing an "onion skin"-like structure (the left picture, X100). The blood vessels between the follicles vertically insert into the germinal center to form a "lollipop"-like follicle (the right picture, X200). (C) The first column was the lower part of the kidney in enhanced CT.
case_images: fsurg-10-1225890-g001.jpg
case_images: PMC10500058_01_fsurg-10-1225890-g001.jpg
case_images: F1
case_images: In the excretory phase, reinforcement was decreased (Figure 1A). However, in histopathological examination of the left kidney including "tumor" + ureter resection specimens, Castleman disease of the kidney (hyaline vascular type), also known as giant lymph node hyperplasia, was diagnosed with a lesion (size 3.7 cm x 3.5 cm x 3.5 cm, Figure 1B). HE staining showed diffusely proliferating lymphoid tissue, scattered lymphoid follicles with partial atrophy, increased blood vessels between follicles, swelling of endothelial cells, and thickening of the vessel wall with hyaline degeneration (Figure 1C).