18-year-old evaluated for a painless forearm mass of unknown chronicity. Figure 1 (Axial T1) Fig. 2 (axial STIR) Fig. 3 (coronal T1) MR images were obtained.

Fig. 1
figure 1

Axial T1 through the distal forearm

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Fig. 2
figure 2

Axial STIR through the distal forearm

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Fig. 3
figure 3

Coronal T1 through the distal forearm

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