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Peer-reviewed veterinary case report

Pseudo-placentational uterine swelling found in young female dog

By Sato, Yoshihiko·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2011·SATO Animal Clinic, Japan·View original on PubMed

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Original publication title: Pseudo-placentational endometrial hyperplasia in a dog.

Species:
dog

Plain-English summary

A 9.5-month-old female dog was found to have a swollen part of her uterus during a routine spay surgery. The vet discovered a buildup of fluid and abnormal tissue growth that resembled a placenta, even though she was not pregnant. This condition, called pseudo-placentational endometrial hyperplasia, can occur in young dogs and may not show obvious symptoms. The dog was treated successfully with the ovariohysterectomy, which removed the affected tissue and resolved the issue.

People also search for: dog swollen uterus · female dog spay surgery complications · pseudo-placentational endometrial hyperplasia in dogs

Abstract

Ovariohysterectomy in a healthy, nonpregnant, non-pseudopregnant, 9.5-month-old female dog revealed a 3 cm in diameter, swollen segmental portion of the uterus. A large amount of mucoserous fluid was present in the segmental portion, and the mucous membrane was covered by many yellowish-white villi protruding into the lumen. Histopathologic examination revealed endometrial hyperplasia associated with dilatation of the uterine glands in the segmental portion. The morphological findings were quite similar to those of a maternal placenta of pregnancy without the fetus and fetal membrane. Accordingly, this young female dog was diagnosed with spontaneous pseudo-placentational endometrial hyperplasia.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/21908378/