title: Intracortical osteosarcoma.
abstract: A case of osteosarcoma is described that originated within the cortex of the tibial diaphysis. This form of osteosarcoma was first described by Jaffe as "intracortical osteogenic sarcoma." A review of the literature indicates that this is probably the rarest presenting form of osteosarcoma. It appears to have a predilection for origin in the diaphysis, and its radiologic appearance may mimic a benign lesion. Follow-up information is given on the two cases originally reported by Jaffe, and the tumor is distinguished from periosteal osteosarcoma with which it has recently been confused.
mesh_terms: D000293:Adolescent; D000328:Adult; D001706:Biopsy; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D013977:Tibia