Reactive lymphoid hyperplasia of the liver: Perinodular enhancement on contrast-enhanced computed tomography and magnetic resonance imaging

Figure 4 Histological findings. A: The nodule is well demarcated and comprises a massive infiltration of mature lymphoid cells, forming lymphoid follicles of various sizes with germinal centers (HE staining, low magnification); B: Prominent sinusoidal dilatation (double-headed arrow) seen around the nodule (HE staining, high magnification) is the likely cause of the perinodular enhancement observed on the contrast-enhanced imaging examinations; C, D: Immunohistochemical staining is positive for CD10, and is negative for Bcl-2. These results exclude follicular lymphoma. HE: Hematoxylin and eosin.