What is the role of imaging studies in the diagnosis of bone angiosarcoma (AS)?

Updated: Sep 04, 2018
  • Author: Maria Belén Carsi, MD, PhD, FRCS; Chief Editor: Edwin Choy, MD, PhD  more...
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Answer

Plain radiographic assessment is paramount to characterize lesions of bone angiosarcoma and confirm their multiplicity. [18] However, the radiographic presentation of bone angiosarcoma is not specific. A solitary lesion (60% of cases) appears as a destructive lytic mass with irregular borders or a mixed lytic-sclerotic pattern and occasional bony expansion. High-grade lesions exhibit features of complete cortical destruction and extension into soft tissue. The vascular nature of the neoplasm can be suggested if synchronous multicentric involvement of several bones of one extremity or anatomic region is present (40% of cases).

Bone angiosarcoma can present a distinctive pattern of soap-bubble lesions because it frequently extends up and down the bone. When the spine is involved, the most common pattern is regional involvement in several contiguous vertebral bodies.

CT scan confirms the permeative, invasive character of the radiographic lesions and their multiplicity.

MRI shows a nonspecific decreased or variable signal intensity in T1 and an increased signal in T2. The lesions enhance with gadolinium. MRI is especially helpful in the characterization of the soft tissue extension and involvement of neurovascular structures and joints.

Delayed whole-body bone scintigraphy shows marked radioisotope uptake, although findings can be negative in aggressive destructive lesions. Radionuclide-tagged red blood cell scanning is helpful in the differential diagnosis with other multifocal vascular processes of bone and multiple myeloma or Langerhans cell histiocytosis.


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