Ewing's sarcoma MRI

Ewing's sarcoma Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Assistant Editor(s)-In-Chief: Michael Maddaleni, B.S.

MRI

• An MRI provides the most precise definition of local extent of bone tumors including the degree of expansion as well as the involvement of blood vessels and nerves in the tumor.
• An MRI is a very important tool for surgical planning as well as staging the tumor. They are also important for evaluating the extent of soft tissue masses.
• An MRI should be routinely used in the work-up of malignant tumors. MRI will show the full bony and soft tissue extent and relate the tumor to other nearby anatomic structures (e.g. vessels).
• On MRI, signal characteristics of Ewing sarcoma include:
• T1:

• Low to intermediate signal

• T2:

• Heterogeneously high signal, may see hair on end low signal striation

• T1 C+ (Gd):

• Heterogeneous but prominent enhancement