Table 1. A Grading System for Split Peroneus Brevis Tendon
Grade of SplitDescriptionMagnetic Resonance Imaging FindingsTreatment
ISplayed-out tendonThe peroneus brevis tendon is flattened between the peroneus longus tendon and lateral malleolus.Conservative treatment
IIPartial-thickness splitThe tendon is flattened and also shows central thinning and some degeneration of tendon structure.Conservative treatment
IIIFull-thickness splitThe tendon had a central “fenestration” and appeared to be separated into 2 fragments on a variable of section.Surgical evaluation and repair
IVSplit extending >2 cmThe tendon had a central “fenestration” and appeared to be separated into 2 fragments on a variable of section.Surgical evaluation and repair