CTICasesLatissimus Dorsi Bursitis
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Imaging findings
A fluctuant chest wall mass is observed as a homogeneous, purely fluid-attenuation collection located deep to the latissimus dorsi muscle. It is well-circumscribed with surrounding healthy fat. Serial imaging demonstrates a fluctuating size, being absent on very old studies, larger on some prior exams, and smaller on the current study.
Key takeaways
Latissimus dorsi bursitis is an inflammatory condition affecting the subtendinous bursa of the latissimus dorsi. It presents as a fluctuant chest wall mass that can mimic an abscess or other soft tissue lesions. The key to diagnosis is recognizing its characteristic location, fluid attenuation, and the history of fluctuating size, which correlates with activity and inflammation. Imaging findings help differentiate it from more sinister pathologies.
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