Rupture of the lateral lobe of the biceps tendon in an Arabian horse

Rupture of the lateral lobe of the proximal tendon of the biceps brachii muscle was diagnosed in an Arabian horse. Although clinical signs were helpful in the identification of the location of the disease, ultrasonographic examination was a more definitive and non-invasive means of diagnosing the pathological condition. Bursoscopic examination of the intertubercolar bursa was also useful in obtaining confirmation of the diagnosis and for debridement and lavage of the bursa. To the Authors' knowledge, this is the only report of this condition in the horse.