Biceps Effusion

Finally, the synovial sheath of the long head of the biceps tendon is formed by an extrusion of the articular synovial membrane. As the sheath is merely an extension of the joint cavity, intra-articular effusion can lead to fluid in the sheath (see Fig. 6.23). Fluid secondary to an isolated biceps tendinitis is rare. 

Fig. 12.55a,b. Partial tears of the semimembranosus tendon. Spectrum of US findings in two different patients with a acute and b chronic trauma, a Transverse 12-5 MHz US image over the posterior hip demonstrates a thickened semimembranosus tendon (arrow) surrounded by anechoic effusion (asterisks), adjacent to the semitendinosus-biceps tendon (SBt). b Transverse 12-5 MHz US image over the posterior hip reveals a markedly hypoechoic and heterogeneous tendon (arrows)... 

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