Ovarian cystadenoma

From Dog
Cross-section of an ovarian cystadenoma[1]

Ovarian cystadenoma are a relatively uncommon benign tumor of the canine ovarian medulla characterized by large-fluid filled vesicles[2].

These tumors involve the rete ovarii (a structure formed from the primary sex cords in females) and usually occur as multiple thin walled serous-containing cysts[3].

Unrelated papillary adenomas arise from the surface epithelium of the ovary.


  1. University of Guelph
  2. Diez-Bru N et al (1998) Ultrasonographic appearance of ovarian tumors in 10 dogs. Vet Radiol Ultrasound 39(3):226-233
  3. Ladds PW (1971) Ovarian serous cystadenoma in a dog. Cornell Vet 61(3):482-485