Latissimus dorsi myotendinous junction tear

Case contributed by Maulik S Patel
Diagnosis almost certain

Presentation

Active cricket bowler for last few years (3 - 4 days a week). History of 'snap' while bowling a few days back. Presents with left axillary pain and swelling.

Patient Data

Age: 25 years
Gender: Male

There is a fluid defect with echoes involving the 'posterior axillary fold'.

A large retracted muscle belly noted medially and posteriorly (latissimus dorsi).

Echogenic fluid tracks around the proximal anteromedial humerus deep to the pectoralis major tendon.

Case Discussion

A 'snap' occurred when the patient tried to give extra bounce while bowling.

There is a complete tear at the myotendinous junction of the latissimus dorsi. The teres major muscle appeared intact on ultrasound, but MRI performed later showed involvement of both muscles (not uploaded, no copyright).

A surgical repair was performed.

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