1/4. Juxtacortical osteosarcoma. A distinct malignant bone neoplasm.The purpose of this report is the study of a malignant bone tumor of similar histological picture with conventional (intramedullary) osteosarcoma. Contributing factors in the study of juxtacortical osteosarcoma are the clinical, X-ray and histologic pictures. A case of parosteal osteosarcoma in a 28-year-old male is reported. In conjuction with X-ray findings we review the histological characteristics of the tumor through serial sections of the peripheral, central and parosteal parts and the findings are described in detail. In addition to the histological findings, differential diagnosis and prognosis are also discussed. From the general study of the tumor it has been shown that juxtacortical osteogenic sarcoma behaves differently in contrast to classic osteosarcoma, depending on the degree of differentiation of the tumor.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
2/4. osteosarcoma of the jaws in children.Two cases of osteosarcoma of the jaws in children are reported. One patient was a 13-year-old girl whose first symptoms included nasal and maxillary sinus congestion, followed by epistaxis. She was found to have chondroblastic osteosarcoma extending through the left maxillary alveolar process and sinus. Following surgery and chemotherapy, the patient has been free of disease for 7 years. The second patient, an 8-year-old boy, was diagnosed with juxtacortical (parosteal) osteosarcoma of the mandible, which is a less aggressive variant of the neoplasm. It is believed that this is the youngest patient reported to date with juxtacortical osteosarcoma of the jaws. He was treated by block resection of the right side of the mandible and is free of disease 3(1/2) years later.- - - - - - - - - - ranking = 0.25keywords = neoplasm (Clic here for more details about this article) |
3/4. Parosteal osteosarcoma of the maxilla.We describe the case of a 47-year-old female who presented with a small nodule in the buccal sulcus in the left maxillary incisor region. Clinical and radiographic examination revealed a small sclerotic neoplasm with a short pedicle. Histopathological examination confirmed a diagnosis of parosteal osteosarcoma. The contribution of CT to the diagnosis and management is discussed.- - - - - - - - - - ranking = 0.25keywords = neoplasm (Clic here for more details about this article) |
4/4. Ossifying fibromyxoid tumor resembling parosteal osteosarcoma.Ossifying fibromyxoid tumor (OFMT) is a rare soft tissue neoplasm which varies in the amount of bone tissue laid down. We report on a case of OFMT in a 59-year-old male which mimicked a large parosteal osteosarcoma on radiography, MRI, and CT. T1-weighted MR images showed high-intensity areas which reflected fatty marrow. The metaplastic bone was connected to the cortex of the femur, but the tumor did not involve the medullary cavity. The tumor was irradiated and the patient was administered chemotherapy. Wide excision of the tumor and hip rotation plasty was performed. The patient has been disease free for 18 months.- - - - - - - - - - ranking = 0.25keywords = neoplasm (Clic here for more details about this article) |