ISSN 2398-2993      

Penile hair ring

obovis
Contributor(s):

Ash Phipps

Paul Wood

Royal Dick School Veterinary Studies logo


Introduction

  • Cause: circumferential accumulation of hair around the penis just proximal to the glans penis.
  • Signs: clinical signs are generally pain, inability to protrude the penis (phimosis) and an inability to serve cows. Ischemic necrosis of the tip of the penis may occur in chronic cases. Urolithiasis may also occur.
  • Diagnosis: is made by visualization of the penis and detecting the hair ring.
  • Treatment: removal of the hair ring.
  • Prognosis: good.

Pathogenesis

Etiology

  • Hairs from the tip of the sheath can accumulate and encircle the tip of the penis.
  • Some bulls (“aggressor”), repeatedly mount other bulls. This activity causes hair to accumulate on and around the penis of the bull that is mounting other bulls.

Pathophysiology

  • Circumferential accumulation of hair often occurs around the penis just proximal to the glans penis.
  • The resulting circumferential position of the hair can cause a stricture and compress the tissues of the penis, causing avascular necrosis and sloughing.

Epidemiology

  • Often occurs in young bulls that are paddocked or housed together.

Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMedResource.
  • Schuler G, Richterich P, & Hoffmann B (2008) Severe balanitis and penile prolapse in a Scottish Highland bull due to an ingrown hair ring. Tierärztliche Praxis Großtiere 36 (6), 385-388.
  • Jean G S (1995) Male reproductive surgery. Vet Clinics North Am Food Anim Pract 11 (1), 55-93.

Other sources of information

  • Divers T & Peek S (2008) Rebhun’s Diseases of Dairy Cattle. 2nd edn. Saunders Elsever, USA. pp 442.
  • Parkinson T J, Vermunt J J & Malmo J (2010) Diseases of cattle in Australasia: a comprehensive textbook. New Zealand Veterinary Association Foundation for Continuing Education, NZ. pp 495.

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