Diagnostic Imaging of Paraprostatic Cyst with Osseous Metaplasia in a Dog

개에서 골화생을 동반한 전립선 주위종의 영상의학 증례

  • 최지혜 (해마루 이차진료동물병원) ;
  • 계서연 (해마루 이차진료동물병원) ;
  • 김성수 (해마루 이차진료동물병원) ;
  • 최희연 (해마루 이차진료동물병원) ;
  • 김현욱 (해마루 이차진료동물병원) ;
  • 윤정희 (서울대학교 수의과대학)
  • Accepted : 2010.01.06
  • Published : 2010.08.30

Abstract

A 6-year-old intact male Doberman pinscher presented with a thin soft stool and urinary signs. On radiography, three masses were observed in the caudal abdomen. One mass was described as a large, round, mineralized mass, with an "eggshell" appearance. The second mass was located caudal to the mineralized mass, and the third mass was located between the two masses. The second and the third masses had a soft tissue density. Ultrasonography was performed to identify the features and the origins of the masses. The first mass contained a large amount of anechoic fluid and had a thin wall; it was determined to be a cyst. Strong acoustic shadowing artifact was created by the mineralized cystic wall. Caudal to the cyst, the second mass was shown to be the prostate. A hypoechoic stalk connected the prostate and the cyst, which represented the cyst as a paraprostatic cyst with mineralization. The third mass was the normal urinary bladder. The cyst was removed surgically and confirmed by histopathologic examination. This report described typical clinical findings, diagnostic imaging, and treatment of a paraprostatic cyst.

Keywords

References

  1. Girard C, Despots J. Mineralized paraprostatic cyst in a dog. Can Vet J 1995; 36: 573-574.
  2. Head LL, Francis DA. Mineralized paraprostatic cyst as a potential contributing factor in the development of perineal hernias in a dog. J Am Vet Med Assoc 2002; 221: 533-535. https://doi.org/10.2460/javma.2002.221.533
  3. Krawiec DR, Heflin D. Study of prostatic disease in dogs: 177 cases (1981-1986). J Am Vet Med Assoc 1992; 200: 1119-1122.
  4. Lamb CL, Kleine LJ, McMillan MC. Diagnosis of calcification on abdominal radiographs. Vet Radiol Ultrasound 1991; 32: 211-220. https://doi.org/10.1111/j.1740-8261.1991.tb00109.x
  5. Lattimer JC. The prostate gland. In: Textbook of veterinary diagnostic radiology, 4th ed. Philadelphia: WB Saunders. 2002: 592-602.
  6. Lisciandro GR. What is your diagnosis? Large, round mass with intramural mineralization in the mid-to-caudal portion of the abdominal cavity; prostatomegaly. J Am Vet Med Assoc 1995; 206: 171-172.
  7. Olsen PN, Wrigley RH, Thrall MA, Husted PW. Disorders of the canine prostate gland: pathogenesis, diagnosis and medical therapy. Compend Contin Edu Pract Vet 1987; 19: 613-623.
  8. Porter RS, Young K, Bahr RJ. What is your diagnosis? J Am Vet Med Assoc 1984; 185: 807-808.
  9. Renfrew H, Barrett EL, Barrett EL, Bradley KJ, Barr FJ. Radiographic and ultrasonographic features of canine paraprostatic cysts. Vet Radiol Ultrasound 2008; 49: 444-448. https://doi.org/10.1111/j.1740-8261.2008.00404.x
  10. Rogers KS, Wantschek L, Lees GE. Diagnostic evaluation of the canine prostate. Compend Contin Educ Prac Vet 1986; 8: 799-811.
  11. Slatter D. Prostatic cysts and paraprostatic cysts. In: Textbook of small animal surgery. 3rd ed. Oxford: WB Saunders. 2002: 1549-1550.
  12. Stowater JL, Lamb CR. Ultrasonographic features of paraprostatic cysts in nine dogs. Vet Radiol Ultrasound 1989; 30: 232-239. https://doi.org/10.1111/j.1740-8261.1989.tb00780.x
  13. Welsh EM, Kirby BM, Simpson JW, Munro E. Surgical management of perineal paraprostatic cysts in three dogs. J Small Anim Pract 2000; 41: 358-361. https://doi.org/10.1111/j.1748-5827.2000.tb03220.x
  14. White RAS. Prostatic surgery in the dog. Clin Tech Small Anim Pract 2000; 15: 46-51. https://doi.org/10.1053/svms.2000.7304
  15. White RAS, Herrtage ME, Dennis R. The diagnosis and treatment of paraprostatic and prostatic retention cysts in the dog. J Small Anim Pract 1987; 28: 551-574. https://doi.org/10.1111/j.1748-5827.1987.tb01272.x
  16. Zekas LJ, Forrest LJ, Swainson S, Phillips LA. Radiographic diagnosis: mineralized paraprostatic cyst in a dog. Vet Radiol Ultrasound 2004; 45: 310-301. https://doi.org/10.1111/j.1740-8261.2004.04058.x