Table I.

PM tear classification^∗.

Extent of tear
Grade I	Contusion or sprain
Grade II	Partial tear
Grade III	Complete tear
Location of tear
A	Muscle origin
B	Muscle belly
C	Myotendinous junction
D	Muscle tendon

PM, pectoralis major.

^∗The above classification system was based on Tietjen et al.²³