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Updated: Jun 28, 2026

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Cutaneous rhabdoid tumor in a cat.

T Izawa1, J Yamate, S Takeda

  • 1Department of Veterinary Science, Osaka Prefecture University, Osaka, Japan.

Veterinary Pathology
|November 6, 2008
PubMed
Summary

A rare rhabdoid tumor was identified in a cat, presenting similar characteristics to human rhabdoid tumors. This finding expands the understanding of rhabdoid tumors in veterinary oncology.

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Area of Science:

  • Veterinary Pathology
  • Comparative Oncology

Background:

  • Rhabdoid tumors are aggressive neoplasms typically affecting infants and children, primarily in the central nervous system and kidneys.
  • In adults, rhabdoid tumors are rare and can occur in various soft tissues.

Observation:

  • A subcutaneous mass was analyzed in a 13-year-old male cat.
  • Histopathology revealed nests and sheets of round to polygonal cells with glassy eosinophilic cytoplasmic inclusions.

Findings:

  • Immunohistochemistry showed vimentin expression in cytoplasmic inclusions, with some cells positive for neuron-specific enolase, neurofilament, or S-100 protein.
  • Electron microscopy confirmed cytoplasmic inclusions composed of intermediate filaments.
  • The observed features closely resemble human rhabdoid tumors and previously reported animal cases.

Implications:

  • This case contributes to the comparative pathology of rhabdoid tumors, highlighting similarities between human and feline neoplasms.
  • It underscores the importance of considering rhabdoid tumors in the differential diagnosis of soft tissue masses in animals.
  • Further research may elucidate the cellular origin and pathogenesis of rhabdoid tumors across species.

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