Urethral obstruction due to an inflammation and necrosis in the os penis of a dog

Abstract

AbstractA 2‐year‐old, 24.8 kg, entire, male, mixed breed dog was evaluated because of acute onset of pollakiuria and stranguria. Abdominal radiographs identified no obvious underlying cause for the stranguria. Abdominal ultrasound revealed prostatic cysts with a periprostatic inflammation. Retrograde contrast urethrography and urethrocystoscopy demonstrated a compressive lesion of the urethra at the caudal end of os penis. Initially, a balloon‐expandable metallic stent was placed in the area of the urethral obstruction. Haematuria and compression of the stent were observed 2 weeks after stent placement. Penile amputation in combination with cryptorchidectomy and neutering as well as scrotal urethrostomy were performed. Recovery was uneventful and the dog was doing well at the 2‐week follow‐up recheck. Histopathology diagnosed a well‐circumscribed necrotic area with haemorrhage within the os penis. The patient was clinically doing well over the next 13 months, but then humanely euthanased due to unrelated reasons.