MSK Misc

Question 1

Buford complex

Answer 1

Variant labral anatomy, mimics tear

• Absent anterior superior labrum (1:00-3:00)
• Thickened middle glenohumeral ligament

Question 2

“Snapping hip” types; cause for each?

• External
• Internal
• Intra-articular

Answer 2

• External: IT band over greater troch
• Internal: iliopsoas over iliopectineal eminence OR femoral head
• Intra-articular: labral tears, loose bodies

Question 3

“Magic Angle”

• Angle = __ degrees?
• Which sequence eliminates this artifact?
• Why does that sequence work?

Answer 3

Artifactual intermediate signal intensity seen in some ligaments (PCL, patellar tendon)

• 55 degrees
• Should go away on T2; if it persists on T2, it’s real
• T2 has long TE; short TE sequences have this artifact (T1, PD, GRE)