Utility of the Pectoralis Major Index in the Diagnosis of Structurally Significant Pectoralis Major Tears.

Background: Diagnosis of pectoralis major tears early in the acute phase is important for optimizing surgical repair and outcomes. However, physical examination of pectoralis major injuries can be misleading, often resulting in a potentially detrimental delay in surgical treatment.

Purpose: To establish and validate a quantifiable clinical diagnostic test for structurally significant pectoralis major tears.