Radiology of Upper Limb (Quiz 2)

Question 1

Boxer’s Fracture

Answer 1

Occurs during a punch with a closed fist

usually involves the 5th met

Question 2

Bennett Fracture

Answer 2

intra-articular fracture-dislocation of the base of the first metacarpal

the most common mechanism of fracture is axial loading of the first met

Question 3

Triquetrum Fracture

Answer 3

second most common fractured carpal

usually avulsions from the dorsal surface

soft tissue abnormalities of the dorsum of the wrist can aid in diagnosis

Question 4

Lunate Dislocation

Answer 4

commonly a result of a fall on an out stretch hand or a blow to the palm that results in severe dorsiflexion and ulnar deviation

Question 5

Perilunate Dislocation

Answer 5

Capitate Fracture

3/4 are associated with scaphoid fracture

crowding of the carpals can indicate this fracture

Question 6

Scaphoid Fracture

Answer 6

most commonly fractured carpal

rarely occurs in pediatric patients

occurs during extreme dorsiflexion of the wrist or extreme ulnar deviation

necrosis can occur

Question 7

Colles Fracture

Answer 7

distal radius fracture and dorsal displacement of the fracture fragment

outstretched hand

most common group with this fracture are elderyly women

Question 8

What age group is elbow trauma most common in

Answer 8

children as a result of play and athletic activities

Question 9

Galeazzi Fracture

Answer 9

Fracture of the distal radius with associated distal radioulnar joint dislocation

AKA reverse monteggia fracture

Question 10

Extra-articular epicondylar humerus fracture

Answer 10

fracture of the medial or lateral epicondyle of humerus

Question 11

Extra-articular supracondylar fracture

Answer 11

fracture line is above the epicondyles of humerus

Question 12

Intra-articular transcondylar fracture

Answer 12

The fracture plane is within the joint capsule, and either the lateral or medial condyle is fractured

Question 13

Intra-articular bicondylar fracture

Answer 13

intra-articular fracture line splits the medial and lateral condyles

Question 14

Monteggia Fracture

Answer 14

fracture of the ulna with accompanying radial head dislocation

may result. from a direct blow to the posterior ulna or fall accompanied with forced pronation of the forearm

radial head displacement into the antecubital fossa

Question 15

Plastic Bowing Fracture

Answer 15

occurs in children

also called greenstick fracture

most common in forearm

Question 16

Radial Head Fracture

Answer 16

most commonly caused by a fall on an outstretched arm

most common elbow fracture in adults

very subtle in radiographs

Question 17

Scapular Fracture

Answer 17

direct trauma to the scapula (fall or MVA)

most difficult to diagnose in the shoulder region

common to find other injuries associated with scapular fractures

Question 18

Anterior Dislocation

Answer 18

more than 95% of all shoulder dislocations are anterior

indirect force to the arm through a combination of abduction, extension, and external rotation

most cases of anterior dis humeral head is lying inferior as well

Question 19

Posterior Shoulder Dislocation

Answer 19

very uncommon

adduction, flexion, and internal rotation

Question 20

Luxatio Erecta Shoulder Dislocation

Answer 20

inferior dislocation of the glenohumeral joint

patient often presents with his arm in 110-160 degrees of abduction

MOI resembles the presentation in that the arm was hyper abducted

neurovascular bundle damage can result

Question 21

Type I Acromio-Clavicular Joint Separation

Answer 21

partial tear of the acromioclavicular ligament with no displacement

Question 22

Type II Acromio-Clavicular Joint Separation

Answer 22

Disruption of the acromioclavicular ligament and widening of the acromioclavicular joint

Question 23

Type III Acromio-Clavicular Joint Separation

Answer 23

Disruption of the acromioclavicular and coracoclavicular ligaments and widening of the acromioclavicular and coraclavicular joints

Question 24

Pisiform Fracture

Answer 24

unusual

result from crush injury/impact to hypothenar eminance