Hydrosalpynx are a relatively common benign neoplasm of the canine ovary characterized by a distally blocked fallopian tube filled with serous or clear fluid.
These fluid-filled cysts can result from chronic ovarian inflammation (a blood-filled tube (hematosalpynx) or pus (pyosalpynx)), segmental aplasia or neoplasia.
A presumptive diagnosis can be made on abdominal ultrasonography and supportive blood tests for detection of estradiol concentration. Estradiol levels of > 20 pg/mL can be considered as evidence of ovarian remnant syndrome or ovarian tumor.
A definitive diagnosis is made by exploratory laparotomy and histological confirmation of the presence of ovarian structures in conjunction with resolution of the signs.
- University of Guelph
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