Scientific Journal

Scientific Journal of the Hellenic Companion Animal Veterinary Society (HCAVS)


Perinephric pseudocyst in cats: a case report

Daniil I.L. DVM, Postgraduate training in Companion Animal Clinic, Faculty of Veterinary Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Greece, Private Practitioner, CityVets Thessaloniki
Drapetis G.I. DVM, Private Practitioner, CityVets Thessaloniki
Kouki M.I. DVM, MSc, PhD, Private Practitioner


A case of a cat with a perinephric pseudocyst is presented.

Clinical case

A 10-year-old neutered male cat presented with a history of increased vocalization, anxiety, and urination problems.

  After clinical examination, complete blood count, biochemical profile, and general urine examination, stage 2 chronic renal failure was diagnosed (mild azotemia, increased serum creatinine levels and proteinuria). Abdominal ultrasound revealed a fluid-filled sac surrounding the left kidney. On the cytologic examination of fine needle aspiration sample, transudative fluid was found.

  Ultrasound-guided drainage of the cyst was decided as a therapeutic approach. Clinical diet and proteinuria treatment were also subscribed for renal disease management.

  The cat presented 5 weeks later with the same symptoms. Abdominal ultrasound confirmed the recurrence of the fluid accumulation and surgical treatment was decided.

  Laparotomy revealed a perinephric pseudocyst which was drained and the edges of the cyst wall were marsipialized.


The cat recovered quickly and symptoms resolved completely. At re-examinations 1- and 3 months after surgery no recurrence was observed. The animal died due to renal disease 6 months post-surgery.


Although drainage of a perinephric pseudocyst is an option of conservative management, surgical removal remains the most definitive treatment.


  • Chew DJ, Dibartola SP, Schenck P (2011) Canine and Feline Nephrology and Urology. 2nd ed. Elsevier.
  • Beck JA, Bellenger CR, Lamb WA, et al (2000) Perirenal pseudocysts in 26 cats. Aust Vet J 78, 166-171.
  • Ochoa VB, DiBartola SP, Chew DJ, et al (1999) Perinephric pseudocysts in the cat: A retrospective study and review of the literature. J Vet Intern Med 13, 47-55.
  • Adamama-Moraitou ΚΚ, Pardali D, Vafiadis I, Patsikas MN, Prassinos NN, et al (2017) Perinephric pseudocyst in a cat: management by ultrasound-guided drainage.
  • Journal of the Hellenic Veterinary Medical Society 68(2).

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