5th Metatarsal Base — Zones (Pseudo-Jones/Jones/Stress)
Zone I: tuberosity avulsion (pseudo-Jones) — usually heals conservatively. Zone II: Jones fracture at metaphyseal–diaphyseal junction — watershed area, higher nonunion → screw fixation esp. athletes. Zone III: proximal diaphyseal stress fracture — often needs surgery + graft in chronic cases.
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1Practised by MCQ
10What is the most common mechanism of injury for a Zone I (Pseudo-Jones) fracture of the fifth metatarsal?
mcqWhich zone of the fifth metatarsal is characterized by a higher risk of nonunion?
mcqWhat is the typical treatment approach for a Zone I (Pseudo-Jones) fracture?
mcqWhat type of imaging is most useful for diagnosing a Jones fracture?
mcqIn which zone would you most likely find a proximal diaphyseal stress fracture of the fifth metatarsal?
mcqWhich of the following statements about Zone II (Jones fracture) is true?
mcqWhat is the main indication for surgical fixation of a Jones fracture?
mcqWhich structure primarily contributes to the avulsion mechanism in Zone I (Pseudo-Jones) fractures?
mcqWhich of the following is NOT a typical characteristic of a proximal diaphyseal stress fracture (Zone III)?
mcqIn Zone II fractures, which anatomical feature contributes to the high nonunion rate?