Sprains, Strains and Automobiles

Question 1

What is the most common type of should dislocation?

Answer 1

Anterior

Question 2

An injury of the anterior glenoid labrum of the shoulder due to an anterior shoulder dislocation is termed?

Answer 2

Bankart lesion/fx

Question 3

A cortical depression in the head of the humerus is called?

Answer 3

Hill-Sachs lesion

Question 4

If a patient had a convulsive seizure, what type of shoulder dislocation, if one occurred, would they most likely have?

Answer 4

Posterior

Question 5

Name the rotator cuff muscles.

Answer 5

Supraspinatus, infraspinatus, teres minor and subscapularis

Question 6

What does the term “critical zone” refer to?

Answer 6

1 cm from where the supraspinatus tendon attaches to the greater tuberosity

Question 7

If a rotator cuff tear exists, what is expected to happen to the acromiohumeral joint space?

Answer 7

It will narrow to less than 6 mm

Question 8

What has occurred if the radiocapitellar line lies in the center of the capitellum?

Answer 8

Nothing, it’s normal (See what I did there? Very Firthian.)

Question 9

What are the most, second-most, and third-most common sites of dislocations in adults?

Answer 9

MC: Shoulder
2nd-MC: IP joints of the fingers
3rd-MC: Elbow

Question 10

What is the most common dislocation of the elbow?

Answer 10

Posterior/posterolateral

Question 11

A 3-year-old comes in to the office complaining of elbow pain. You observe that the child is holding their forearm in pronation, and the pain seems to be relieved when it is supinated. There are no radiographic findings whatsoever. What injury are you thinking has occurred?

Answer 11

Nursemaid’s Elbow; Entrapment of the annular ligament by the radial head

Question 12

What is the most common type of carpal dislocation, and how does it occur?

Answer 12

Perilunate; FOOSH

Question 13

What is the second-most common type of carpal dislocation, and how does it occur?

Answer 13

Lunate; Hyperextension injury

Question 14

What radiographic finding is associated with a lunate dislocation?

Answer 14

Pie sign

Question 15

A patient comes in with a wrist injury that they sustained after falling on their outstretched hand. Radiographically, you observe a gap that you very astutely identify as “Terry Thomas sign” or “ring sign.” What injury, do you think, has occurred?

Answer 15

Rotatory subluxation of the scaphoid

Question 16

A patient comes in with an injury to the thumb. They say that they have repetitively received valgus stress to the area (how they knew to say “valgus,” we may never know). You also find that they may have disrupted their UCL as well. What is your diagnosis?

Answer 16

Gamekeeper’s thumb

Question 17

What is the most common dislocation of the hip?

Answer 17

Posterior

Question 18

What is the most common dislocation of the hand?

Answer 18

Dorsal

Question 19

A patient comes in complaining of hip pain. They say they were flexed at the hip before receiving the injury. What injury are you thinking? What will you find radiographically that could help confirm your rationale?

Answer 19

Posterior hip dislocation; Radiograph –> posterior acetabular rim fx associated

Question 20

Since Brainscape doesn’t shuffle these, I won’t do an obvious case that clearly leads to an anterior hip dislocation. Instead, what mechanism of injury would lead to an anterior hip dislocation?

Answer 20

Abduction and external rotation of the leg

Question 21

A patella will most likely dislocate in what direction?

Answer 21

Lateral/superolateral

Question 22

You’re reading an MRI of a patient that came in with severe knee pain after a sports-related injury (or so they say, kids these days…). You observe that the PCL is completely visible. This is normal, right?

Answer 22

No way, Jose… They done gone and tore their ACL. The PCL shouldn’t be completely visible if the ACL is fine because they cross and stuff.

Question 23

A patient comes in after falling from a balcony (crazy kids, again…). They have foot pain and you observe a dorsal dislocation in the tarsometatarsal area. What are you thinking?

Answer 23

Lisfranc dislocation

Question 24

Lisfranc dislocations can occur without any trauma. In what patient population would you expect to see this?

Answer 24

Diabetics

Question 25

A rare injury in which the foot is displaced medially, resulting in a midtarsal dislocation is termed?

Answer 25

Chopart’s dislocation