Subscapularis tear
SSc tear classification
30% length of entire footprint
Almost 80% of tear occurs in the F1
Insertion angle
F1 : closest to SSt angle → abd. than rotation
F2 : almost parallel with humeral shaft
SSc tear
anterior shoulder pain
loss of arm function in activities of daily living such as washing under the contralateral arm
belly press
lift-off test (> 75%)
increased passive ER (complete)
SSc tear US is limited
Sensitivity was lower for small tears → SSc tear without retration
SSc tear on MRI
MRI to assess the subscapularis
frequently missed (62.5% SSc tear missed, Pre-op MRI sensitivity : 36%)
tears are best appreciated on axial images
presence of biceps subluxation indicates a subscapularis tear
Atrophy of the upper SSC
SSc tear on MRI