Diagnostic Studies. Radiographs may also show calcification in areas of necrosis and metaplastic bone or cartilage inside lipomas. MRI reveals a homogenous fatty tumor that can be quite large. Treatment/Prognosis….
Purely osteolytic metastases are generally from lung, kidney, thyroid, or colon cancer. Metastatic bone tumors from kidney or thyroid carcinoma are usually hypervascular, and preoperative embolization should be considered. Osteoblastic…
Diagnostic Studies. The radiographic appearance consists of multiple small, oval, radiolucent cortical defects with a distinct margin of reactive bone and a thickened cortex. Adamantinoma typically has a “soap bubble”…
Diagnostic Studies. Radiographs show a permeative usually diaphyseal tumor with a mottled, or patchy, density that indicates the tumor’s destructive nature. Cortical involvement frequently produces a reactive, “onionskin” appearance of…
Diagnostic Studies. The results of most staging studies are the same as for other malignant primary tumors. On bone scans, however, myelomas may not appear as abnormal (cold lesions). Laboratory…
MALIGNANT FIBROUS HISTIOCYTOMA Malignant fibrous histiocytoma occurs less often in bone than in soft tissues. It usually presents as an aggressive stage IIB sarcoma; not infrequently, a pathologic fracture is…
Histologic features consist of mature trabeculae with a peculiar pattern of cement lines similar to that seen in Paget disease of bone. Enmeshed in a low-grade stroma, the trabeculae often…
Osteosarcoma usually develops in adolescents and affects males slightly more often than females. Although the lesion may occur throughout the skeleton, in 50% of patients it occurs in the region…
Diagnostic Studies. Radiographs reveal a large radiolucent lesion surrounded by a distinct margin of reactive bone. Cortical thinning, endosteal erosion, and trabecularization, or bony septation, of the cavity are associated…
Results of staging studies reflect the tumor’s aggressive nature. Bone scans show intense radioisotope uptake and reveal metastatic lesions to other bones. MRI provides more detailed information about intraosseous involvement,…
