Paraovarian cyst

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Paraovarian cyst diagnosed during routine ovariohysterectomy[1]

Paraovarian cysts are a benign cystic structure of the canine ovary often seen in association with granulosa cell tumors and ovarian remnant syndrome[2].

These cysts can form as paramesonephric duct cysts, mesonephric duct cysts and mesonephric tubule cysts.

Clinical symptoms are often nonspecific and may include persistent estrus, abdominal pain and a palpable mass in the central abdomen[3].

A presumptive diagnosis is usually achieved with abdominal ultrasonography, showing a mass lesion effect.

A definitive diagnosis includes hydrosalpynx, cystadenoma, ovarian teratomas, ovarian carcinoma and dysgerminoma[4].

Treatment is usually curative with ovariohysterectomy[5].


  1. ARMAC Veterinary Group
  2. Sontas BH et al (2011) A huge ovarian cyst in a hysterectomized bitch. Reprod Domest Anim 46(6):1107-1111
  3. Kim H et al (2012) A giant parovarian cyst in a dog with a granulosa cell tumor. J Vet Med Sci 74(3):385-389
  4. Bertazzolo W et al (2004) Cytological features of canine ovarian tumours: a retrospective study of 19 cases. J Small Anim Pract 45(11):539-545
  5. Brazzell JL & Borjesson DL (2006) Intra-abdominal mass aspirate from an alopecic dog. Vet Clin Pathol 35(2):259-262