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Abdominal fluid from a dog.

Michael M Fry1, Hilde E V DeCock, Melanie A Greeley

  • 1Veterinary Medical Teaching Hospital and Department of Pathology, Microbiology, and Immunology, University of California, One Shields Avenue, Davis, CA 95616, USA. mmfry@ucdavis.edu

Veterinary Clinical Pathology
|July 2, 2003
PubMed
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This case report details a rare oviductal hamartoma in a dog, a benign tumor of the oviduct. Finding ciliated columnar epithelial cells in abdominal fluid can indicate oviductal disease in dogs.

Area of Science:

  • Veterinary Pathology
  • Canine Reproductive Medicine
  • Surgical Oncology

Background:

  • Oviductal abnormalities are uncommon in domestic animals.
  • Hamartomas are benign tumors composed of disorganized mature tissues normally found at that site.
  • Diagnosis of abdominal masses in dogs often involves advanced imaging and cytologic evaluation.

Observation:

  • A 2-year-old female dog presented with lethargy, anorexia, abdominal distension, and a palpable abdominal mass.
  • Abdominal ultrasound revealed a large midabdominal mass with moderate peritoneal effusion.
  • Cytologic analysis of abdominal fluid identified pyogranulomatous inflammation, hemorrhage, mesothelial reactivity, and ciliated columnar epithelial cells.

Findings:

  • Surgical excision of the abdominal mass was performed.

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  • Histopathologic diagnosis of the mass was oviductal hamartoma with significant stroma formation and acute hemorrhage.
  • This is the first reported case of an oviductal hamartoma in any species and the first description of ciliated columnar epithelial cells in canine abdominal fluid.

    • Implications:

    • The presence of ciliated columnar epithelial cells in abdominal fluid should prompt consideration of an underlying oviductal lesion in dogs.
    • Oviductal hamartomas, though rare, should be included in the differential diagnosis for abdominal masses in female dogs.
    • This finding expands the understanding of canine reproductive tract pathology and diagnostic cytology.