Illustration 3 from www.aafp.org/afp/980700ap/burrough.html

Enlargement of the radiograph shown in Figure 2. Note the fleck sign (arrow), which is a bony fragment indicating severe disruption of the Lisfranc joint. The triangles indicate the malalignment of the proximal base of the second metatarsal and the medial margin of the middle cuneiform.

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