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High-Grade Myxoid Liposarcoma (Round Cell Variant) in a Dog.

Q D Plumlee1, A M Hernandez1, S D Clark1

  • 1Department of Veterinary Pathobiology, USA.

Journal of Comparative Pathology
|September 26, 2016
PubMed
Summary
This summary is machine-generated.

A novel canine liposarcoma case presented with distinct cell populations and cytoplasmic vacuoles. This rare myxoid liposarcoma with round cells challenges current veterinary classifications.

Keywords:
doghigh-grade myxoid liposarcomaround cell liposarcoma

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Area of Science:

  • Veterinary Pathology
  • Oncology
  • Comparative Pathology

Background:

  • Liposarcomas are malignant tumors of adipose tissue.
  • Accurate classification is crucial for prognosis and treatment in veterinary oncology.
  • Canine liposarcoma classification currently follows the World Health Organization (WHO) system.

Observation:

  • A 10-year-old Basset hound presented with a large abdominal wall mass.
  • Cytology revealed neoplastic round cells with cytoplasmic vacuoles.
  • Histology showed two distinct cell populations: spindle-shaped cells with myxoid matrix and round cells, with intracytoplasmic lipid vacuoles.

Findings:

  • The canine neoplasm exhibited features of both myxoid and pleomorphic liposarcoma variants.
  • Morphologically, it was analogous to human high-grade myxoid liposarcoma.
  • This represents a previously undescribed variant: myxoid liposarcoma with round cells in dogs.

Implications:

  • This case suggests the need for re-evaluation of the current WHO classification of liposarcomas in animals.
  • Recognizing this distinct subtype may improve diagnostic accuracy and therapeutic strategies.
  • Further research into canine liposarcoma subtypes is warranted.