Fig. 2
From: Unicentric Castleman’s disease in the parotid gland associated with psoriasis: a case report
The histological microphotographs of Castleman’s disease (hematoxylin–eosin stain). A Low magnification of the lesion showed areas of vascular proliferation distributed in the interfollicular regions (original magnification × 100). B The lymphoid parenchyma was composed of the lymphoid follicle with the characteristic of “onion skin” laying of lymphocytes in the mantle zone (original magnification × 200). C The “lollipop” appearance was formed by radially penetrating sclerotic blood vessels with concentric mantle zones (original magnification × 200). D High magnification of mantle cell layers in targetoid with the vascular proliferation in germinal center (original magnification × 400)