Biceps brachii long head tendon rupture
The patient complained of a mass in the distal third of the medial upper arm.
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Retraction of the long head of the biceps brachii towards the elbow. The ruptured tendon forms a convolute at the proximal end of the muscle belly. There is also some minor hemorrhage.
Case DiscussionA neoplasm can be excluded by following the distal biceps tendon from its insertion into the muscle belly.
Normally this should be a clinical diagnosis, but it can be missed in obese people with weak musculature. A history of trauma is rather the exception.