Abstract
Introduction: Biceps tendinosis, a milder form on the spectrum of biceps tendinopathy, is unusual at the distal insertion site. Patients with distal biceps tendinosis may experience pain and dysfunction which could inhibit their activities of daily living. Diagnosis of distal biceps tendinosis may be facilitated with ultrasonography (US), whose accuracy is increasingly recognised, while providing many benefits over other modalities, like magnetic resonance imaging (MRI). Case report: We report two cases of distal biceps tendinosis diagnosed by US with clinical details, imaging findings and patient management. Two patients present with elbow pain after nontraumatic activities. US revealed a thickened distal biceps tendon with mild heterogeneous hypoechogenicity without fibre disruption or retraction in both cases and evidence of hyperemia on Doppler with surrounding bursal fluid in case 2. Discussion: Tendinosis has variable aetiologies, but US commonly cannot differentiate among these; therefore, patient’s clinical history is the major component in determining the underlying cause. Chronic progression of tendon pathology leads to partial and full thickness tears. Tendinosis has a characteristic US appearance. US has many benefits and clinicians may use this modality to assess possible pathological structures with ease, convenience and efficiency compared with using MRI. Conclusion: Distal biceps tendinosis may present with clinical symptoms of pain and decreased activities of daily living, and may progress to more severe forms of tendinopathy. Early diagnosis is beneficial for the treatment outcomes of this condition. US can visualise distal biceps tendinosis with reliability, providing an alternative diagnostic technique with many benefits compared with MRI.
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