Gross and microscopic pathology of benign fibrous histiocytoma.
Macroscopic view of the resection specimen in transverse orientation. Large yellow osteodestructive tumor originating from iliac bone and with extensive extraosseous parts. Invasion of massa lateralis of sacral bone. Sharp borders between tumor and bone are indicative of a slow-growing neoplasm.
Histology of the resection specimen. Spindle tumor cells admixed with some multinucleated giant cells (left) and foamy macrophages (middle) and cholesterol clefts (right). (Hematoxyllin and Eosin x)
World J Surg Oncol. 2004; 2: 38.