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  • Title: Ultrasonography and Surgical Treatment of an Unusual Case of Urethral Calculus in an Arabian Horse.
    Author: Abu-Seida AM, Shamaa AA.
    Journal: J Equine Vet Sci; 2020 Sep; 92():103150. PubMed ID: 32797778.
    Abstract:
    This case report records an obstructive urolithiasis due to a large calcium carbonate urethral stone in an 11-year-old Arabian stallion. The stallion had colicky pain, anuria, and reduction in food and water intakes. Palpation of the penis revealed rhythmic contractions of the urethra, a hard mass in the penile urethra at the level of the ischial arch, and a dilated urethra proximal to the mass. Rectal examination revealed a distended and turgid urinary bladder. Passing a urethral catheter revealed a complete urethral obstruction at the level of the ischial arch. Ultrasonography revealed a calculus that appeared as an irregular, hyperechoic arch-like thick line with acoustic shadowing. Subischial urethrotomy was conducted under epidural anesthesia. Uneventful recovery was seen with no recurrence or complications for 12 months of available follow-up. In conclusion, clinical, rectal, and ultrasound examinations are valuable for definite diagnosis of urethral calculi in horses and the subischial urethrotomy appears to be successful in correcting this condition in horses.
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