Vertebral compression fractures: distinction between benign and malignant causes with MR imaging

Area of Science:

• Radiology
• Oncology
• Orthopedics

Background:

• Vertebral compression fractures often lack clear etiology on plain radiographs.
• Differentiating benign from malignant causes is crucial for patient management.
• Magnetic resonance (MR) imaging offers detailed visualization of bone marrow.

Purpose of the Study:

• To evaluate the efficacy of MR imaging in differentiating benign from malignant vertebral compression fractures.
• To identify specific MR imaging features indicative of fracture etiology.
• To assess the diagnostic accuracy of MR imaging in this context.

Main Methods:

• MR imaging was performed on 64 patients with 109 vertebral compression fractures.
• Fracture causes were classified as benign or malignant.
• Bone marrow signal intensity and pattern on MR images were analyzed.

Main Results:

• Complete bone marrow replacement was observed in 22/25 malignant fractures.
• Complete bone marrow preservation was seen in 47/61 benign fractures without trauma history.
• Incomplete marrow replacement with irregular patterns suggested malignancy, while regular patterns suggested benign processes.
• Diagnostic accuracy for differentiating benign from malignant fractures reached 94% using specific MR criteria.

Conclusions:

• MR imaging is a valuable tool for differentiating benign from malignant vertebral compression fractures.
• Specific patterns of bone marrow replacement on MR images aid in determining fracture etiology.
• MR imaging provides crucial information beyond plain radiographs for fracture diagnosis.