Merck Manual

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Professional Version

Cystic Right Oviduct in Poultry

By

Rodrigo A. Espinosa

, DVM, DACPV, Aviagen

Medically Reviewed Aug 2019 | Modified Oct 2022

Fluid accumulation in the vestigial right oviduct is a common finding in hens. The abdominal cyst is filled with clear fluid and is attached to the right side of the cloacal wall. The cyst may vary in size from barely perceptible to 15–20 cm in diameter. An increased incidence has been seen in flocks after infectious bronchitis virus outbreaks. Oviductal cysts are a necropsy finding that rarely, if ever, affect flock performance.

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