Image Interpretation: Bursa fluid collection surrounding the distal biceps tendon with surrounding hyperemia consistent with bicipitoradial bursitis
Teaching Pearl: Bicipitoradial bursitis is a relatively uncommon cause of elbow pain, often related to repetitive mechanical irritation near the distal biceps tendon. Short-axis ultrasound may show a U-shaped bursal fluid collection surrounding the distal biceps tendon, while a pronator-window long-axis view helps evaluate the tendon insertion and adjacent bursa.
The scan should also assess for distal biceps tendinopathy or partial tears because bursal inflammation may be secondary. Doppler and compressibility can help distinguish bursal fluid from a solid mass or vascular structure.
References:
1. Yap SH, Griffith JF, Lee RKL. Imaging bicipitoradial bursitis: a pictorial essay. Skeletal Radiol. 2019;48(1):5-10. doi:10.1007/s00256-018-2970-0
2. Draghi F, Gregoli B, Sileo C. Sonography of the bicipitoradial bursa: a short pictorial essay. J Ultrasound. 2012;15(1):39-41. doi:10.1016/j.jus.2012.02.003
3. Smith J, Finnoff JT, O’Driscoll SW, Lai JK. Sonographic evaluation of the distal biceps tendon using a medial approach: the pronator window. J Ultrasound Med. 2010;29(5):861-865. doi:10.7863/jum.2010.29.5.861