Hand

Question 1

Mallet Finger

Answer 1

• Rupture of extensor tendon from distal phalanx

- Mech: jamming finger

Question 2

Jersey Finger

Answer 2

• FDP tendon rupture from P3

- Mech: forced extension against a flexed finger

Question 3

Gamekeeper’s Thumb

Answer 3

• Thumb MCP joint proper ulnar collateral ligament injury

- Mech: forced radial deviation (ski pole injury)

Question 4

How many extensor tendon zones?

Answer 4

9

Question 5

How many flexor tendon zones?

Answer 5

5

Question 6

Boundaries of Flexor zone 1

Answer 6

Distal to FDS insertion

Question 7

Boundaries of Flexor zone 2

Answer 7

Finger flexor retinaculum

Question 8

Boundaries of Flexor zone 3

Answer 8

Palm

Question 9

Boundaries of Flexor zone 4

Answer 9

Carpal tunnel

Question 10

Boundaries of Flexor zone 5

Answer 10

Wrist and forearm

Question 11

Boundaries of Extensor zone 1

Answer 11

DIP joint

Question 12

Boundaries of Extensor zone 2

Answer 12

Middle phalanx

Question 13

Boundaries of Extensor zone 3

Answer 13

PIP joint

Question 14

Boundaries of Extensor zone 4

Answer 14

Proximal phalanx

Question 15

Boundaries of Extensor zone 5

Answer 15

MCP joint

Question 16

Boundaries of Extensor zone 6

Answer 16

Metacarpal

Question 17

Boundaries of Extensor zone 7

Answer 17

Wrist

Question 18

Boundaries of Extensor zone 8

Answer 18

Distal forearm

Question 19

Boundaries of Extensor zone 9

Answer 19

Proximal forearm