In the case reported we have a new growth of tissue, due to trauma with hemorrhage. The hemorrhage, coagulation necrosis, altered circulation and proximity to bone favored the formation of bone in the organization of the embryonal tissue, formed in the natural attempt at repair.
There are seen various transformations and massing of these young cells. Osteitis fibrosa, hemorrhagic osteomyelitis, and giant-cell tumor of bone have their representations in the microscopic pathology of this ossifying hematoma.
(C) 1928 All Rights Reserved.The Journal of Bone and Joint Surgery, Inc.