Fig. 1
From: Ossifying metaplasia of urothelial metastases: original case with review of the literature
Histological findings at the time of the primary tumor resection (Hematoxylin & Eosin, H&E): The primary tumor consisted of a high grade urothelial carcinoma infiltrating the bladder wall; at the periphery of the tumor, a small focus of osteomedullary bone intimately admixed with the urothelial carcinoma was composed of small and non atypical osteocytes within mature-appearing trabeculae of lamellar bone (a, Original magnification 20× and b, 200×). c: a focus of bone metaplasia is seen at the hilum of a metastatic lymph node (100×)