Classification Scheme of Teitjen for Injury to the Pectoralis Major Muscle

Tietjen developed a classification system for injuries to the pectoralis major muscle. This was expanded by Bak et al.

Injuries to the Pectoralis Major Muscle	Type
contusion or sprain	I
partial tear	II
complete tear	III

Subclassification for Type III Injuries	Subtype
muscle origin	IIIA
muscle belly	IIIB
tendinous insertion	IIIC
avulsion of the tendon	IIID
avulsion of the bone	IIIE
rupture of the muscle tendon	IIIF

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