Orthonotes
Orthonotes
by the.bonestories
v3.0 Fusion
v3.0 Fusion
trauma topic hub

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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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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Question 1

What is the most common mechanism of injury for a Zone I (Pseudo-Jones) fracture of the fifth metatarsal?

Question 2

Which zone of the fifth metatarsal is characterized by a higher risk of nonunion?

Question 3

What is the typical treatment approach for a Zone I (Pseudo-Jones) fracture?

Question 4

What type of imaging is most useful for diagnosing a Jones fracture?

Question 5

In which zone would you most likely find a proximal diaphyseal stress fracture of the fifth metatarsal?

Question 6

Which of the following statements about Zone II (Jones fracture) is true?

Question 7

What is the main indication for surgical fixation of a Jones fracture?

Question 8

Which structure primarily contributes to the avulsion mechanism in Zone I (Pseudo-Jones) fractures?

Question 9

Which of the following is NOT a typical characteristic of a proximal diaphyseal stress fracture (Zone III)?

Question 10

In Zone II fractures, which anatomical feature contributes to the high nonunion rate?