Figure 4: von Brunn nests in comparison with nested variant of urothelial carcinoma showing regularly spaced urothelial nests with a relatively flat base (hematoxylin-eosin, original magnification ×200). Nested variant of urothelial carcinoma taken from Dhall et al. [2]. The figures have been reproduced with the permission of the editor in chief of Archives of Pathology and Laboratory Medicine on behalf of the editorial board of the journal.