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Intertrabecular vertebral metastases: metastases only detectable on MR imaging
1Department of Anatomic and Diagnostic Pathology, Dokkyo University School of Medicine, Mibu, Tochigi 321--0293, Japan.
Seminars in Musculoskeletal Radiology
|August 14, 2001
Summary
Intertrabecular vertebral metastases, the most common skeletal metastases, infiltrate bone marrow undetected by standard imaging. Magnetic resonance (MR) imaging is crucial for detecting these lesions, unlike radiography or bone scans.
Area of Science:
- Orthopedics
- Radiology
- Oncology
Background:
- Intertrabecular vertebral tumors infiltrating marrow without altering bone structure are radiographically occult.
- Understanding the prevalence and detection of these specific metastases is clinically significant.
Purpose of the Study:
- To review the histological and radiological characteristics of intertrabecular metastases.
- To assess the diagnostic efficacy of different imaging modalities for these lesions.
Main Methods:
- Histological examination of 69 cadavers with vertebral bodies.
- Radiographic and bone scan analysis of identified metastatic lesions.
- Magnetic resonance (MR) imaging evaluation of vertebral metastases.
Main Results:
- Metastatic tumors were present in 940 of 1653 vertebral bodies.
- Intertrabecular metastases constituted 36.9% of all metastatic lesions.
- Radiography detected only 5.8% and bone scans 3.3% of intertrabecular metastases, while MR imaging detected 94.6%.
Conclusions:
- Intertrabecular metastasis is the most common type of skeletal metastasis.
- Standard radiography and bone scans are inadequate for detecting intertrabecular vertebral metastases.
- Magnetic resonance imaging is the most effective modality for diagnosing intertrabecular vertebral metastases.