History: 12 year old female with no known past medical history fell and hit her right knee while on a cruise ship (Figs. 1, 2, 3 and 4).

Fig. 1
figure 1

Coronal proton density-weighted fat-saturated

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Fig. 2
figure 2

Sagittal T2-weighted fat-saturated

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Fig. 3
figure 3

Sagittal T2-weighted fat-saturated

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Fig. 4
figure 4

Coronal proton density-weighted fat-saturated

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