This six-year-old warmblood had a one-month history of left front (LF) lameness that improved with an abaxial sesamoid nerve block. The lameness appeared to resolve after 2-3 weeks of rest but then recurred when the horse returned to work. He was then referred to Tufts Hospital for Large Animals at Cummings School of Veterinary Medicine for further work-up and imaging. Additional imaging included an ultrasound of the LF pastern due to the previous response to perineural anesthesia.
The following ultrasound clip is obtained along the palmarolateral aspect of the LF pastern at the level of P1. Lateral is to the right of the screen. What abnormalities do you see here?
The second ultrasound clip is obtained along the palmar aspect of P2 with a microconvex probe positioned between the heel bulbs. Lateral is to the right of the screen. What abnormalities do you see here?
Imaging Findings: There is a moderately hypoechoic area in the lateral branch of the superficial digital flexor tendon in the transverse view and a corresponding moderately irregular fiber pattern in the longitudinal view.
Imaging Conclusions: Moderate superficial digital flexor lateral branch tendonitis.
Imaging Findings: There is a moderate amount of anechoic fluid surrounding the medial and lateral lobes of the deep digital flexor tendon at the level of P2.
Imaging Conclusions: Moderate navicular bursa effusion.
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