Imaging Guidelines for Thoracic Back Pain with Suspected Neoplasm

Rationale for MRI with Contrast

The American College of Radiology recommends MRI without and with IV contrast as the initial imaging modality of choice in patients with thoracic back pain and suspected neoplasm, due to its superior soft tissue resolution and ability to characterize the mass, assess for cord compression, and evaluate neural structure integrity 1, 2
The addition of contrast is critical because postcontrast sequences are more sensitive in assessing small marrow-replacing lesions and identifying intradural disease compared to non-contrast MRI alone, with a focus on characterizing lesions in the thoracic spine 3
MRI provides superior soft tissue resolution to characterize the mass, assess for cord compression, canal compromise, cord signal abnormality, and evaluate the integrity of neural structures, particularly in the context of thoracic back pain with a lipoma-like mass 2, 3

Plain radiographs have low sensitivity for soft tissue masses and are only useful in urgent settings to identify osseous destruction or alignment changes, but are not adequate for characterizing a lipoma-like mass in the thoracic spine 1, 2
CT without contrast better depicts osseous detail but is inferior to MRI for soft tissue evaluation and would miss critical marrow pathology and neural structure involvement in patients with thoracic back pain and suspected neoplasm 2

Do not order MRI without contrast alone when a mass lesion is suspected, as non-contrast sequences miss critical diagnostic information about enhancement patterns that distinguish benign from malignant lesions, particularly in the context of thoracic spine lesions 3
Do not delay imaging if myelopathy signs emerge, as this requires immediate MRI evaluation to assess for cord compression and neural structure compromise 4

Order MRI thoracic spine without and with IV contrast immediately as the initial study for patients presenting with thoracic back pain and a lipoma-like mass, as recommended by the American College of Radiology 1, 2
Consider complementary CT without contrast for presurgical planning if surgery is indicated, to better delineate osseous anatomy and guide surgical intervention 2