Radiologic features of Castleman’s disease involving the renal sinus: A case report and review of the literature

Figure 1 Plasma cell type of Castleman’s disease involving the renal sinus and adjacent parenchyma in a 65-year-old woman. A: Coronal contrast-enhanced computed tomography (CT) image showing bilateral renal pelvis duplication; B: Axial contrast-enhanced CT image obtained at the renal hilum level shows mildly homogenous enhancement of a soft tissue mass in the right lower renal sinus; C: T2-weighted images (TR/TE, 10000/82.6) showing a soft tissue mass in the right renal sinus with slightly hypointense signals compared to that of the renal cortex; D: Diffusion-weighted images (b = 800 s/mm²) showing that the mass (open arrow) is mildly hyperintense, and a hyperintensity lesion is in the renal parenchyma (solid arrow).

Figure 2 Histological examination of the right kidney in a 65-year-old woman. A: Photomicrograph (original magnification, 40×; hematoxylin-eosin staining) showing hyperplastic lymphoid follicles (asterisks) in renal sinus fat tissue below the normal renal pelvis (open arrow) in the lower right renal sinus; B: Interfollicular areas showing heavy staining.