Intravesical foreign body causing a cystolith in a gelding.

Summary: A 4‐year‐old gelding was referred to the clinic with a history of haematuria and stranguria after exercise. Transrectal examination and endoscopy of the urinary bladder revealed the presence of a cystolith. The patient underwent general anaesthesia to remove the bladder stone through a para‐inguinal approach. A layer of calcium carbonate was found covering a foreign body acting as the nidus of the urolith. The foreign body was a 4 × 3 cm rubber tie of unknown origin. Surgery and recovery were uneventful without recurrence of clinical signs for up to 2 years after surgery. This is the first published report describing a laparocystotomy for removal of a cystolith secondary to an intravesical foreign body in a gelding. Migration of a foreign body into the urinary bladder, although very uncommon, is possible. [ABSTRACT FROM AUTHOR]