Mri Shoulder

Front 1

Supraspinatous inserts on?

Back 1

inserts on greater tuberosity of humerus

Front 2

Supraspinatous inserts just lateral to?

Back 2

inserts just lateral to bicipital groove

Front 3

Reasons for high signal in supraspinatous?

Back 3

1. Partial volume with peritendinous fat on coronals
2. Muscle slips on coronals
3. "Magic angle" of 55 degrees to bore of magnet
4. Tendinopathy, ie myxoid and fibrillar degeneration in older people
5. Tendonitis or partial tear

Front 4

Reasons for fluid in subacromial bursa?

Back 4

Invariably seen with full thickness supraspinatous tear.
Also seen with isolated subacromial bursitis and recent (days) subacromial bursal injection.

Front 5

Percentage rotator cuff tear that will heal by itself?

Back 5

~25%

Front 6

Tear at insertion of supraspinatous fibers onto greater tuberosity is called?

Back 6

is called "rim-rent" tear

Front 7

Hill-Sachs lesion consists of?

Back 7

Consists of bony impaction on posterosuperior aspect of humeral head.
Seen on top 2-3 axial images, any irregularity posteriorly is abnormal.
Occurs in repeated anterior dislocation.

Front 8

Order of involvement in labral tear for areas of labrum?

Back 8

Involved in the order:
Anterior
Posterior
Superior

Front 9

SLAP lesion consists of?
Seen in?

Back 9

consists of superior labral tear (superior labrum anterior to posterior)
Throwing athletes due to pull of biceps which inserts on superior labrum.

Front 10

Sublabral foramen

Back 10

normal varient in anterosuperior labrum that mimics tear/detachment

Front 11

Buford complex

Back 11

normal varient
absent anterosuperior labrum in association with thickened, cordlike middle glenohumeral ligament

Front 12

Sublabral recess

Back 12

normal varient
thin, smooth area of contrast involving anterior part of superior labrum, extending medially

Front 13

If biceps tendon it torn, what else must be present?

Back 13

subscapularis tear must be present when?

Front 14

Suprascapular nerve entrapment

Back 14

occurs when tumor or ganglion compresses nerve as it runs over scapula, leading to infraspinatus atrophy (which it innervates)

Front 15

Quadrilateral space syndrome

Back 15

occurs when fibrous band or scar tissue impinges on axillary nerve, leading to teres minor atrophy.

Front 16

Suprascapular nerve innervates what shoulder muscles?

Back 16

innervates supraspinatus, infraspinatus

Front 17

Axillary nerve innervates what shoulder muscles?

Back 17

innervates teres minor/deltoid

Front 18

Parsonage-Turner syndrome?

Back 18

Muscle edema in muscles innervated by axillary or suprascapular nerve without history of trauma. Picked up on fat suppression.