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Aortic chemodectoma causing a lymphocyte-rich effusion in a cat
  1. I. del Busto1,
  2. K. Stiborova1,
  3. E. Villiers2,
  4. A.J. Ferreira1 and
  5. E.F. Bode1
  1. 1 University of Liverpool Small Animal Teaching Hospital, Neston, UK
  2. 2 Dick White Referrals, Six Mile Bottom, UK
  1. Correspondence to Dr I. del Busto; i.delbustocastro{at}


A 13-year-old neutered male domestic shorthaired cat presented to a primary care practice with a few days history of dyspnoea. Pleural effusion was diagnosed radiographically. Thoracocentesis was performed and analysis of the effusion was consistent with a lymphocyte-rich effusion (presumed chylothorax). The cat was referred for further investigations to determine the cause of the effusion. Subsequent CT and echocardiography revealed a heart base mass that was seen to infiltrate the interventricular septum. Fine needle aspiration of the mass was performed. Cytological evaluation revealed it to be neuroendocrine in origin, consistent with a chemodectoma. There was no evidence of metastatic disease. The cat was discharged for palliative care only and survived symptom free for a further six weeks at which time it was euthanased due to recurrence of pleural effusion. To the authors’ knowledge this is the first reported case of lymphocyte-rich effusion due to a chemodectoma in a cat.

  • cats
  • chemodectoma
  • aortic base mass
  • pleural effusion
  • chylothorax
  • lymphocyte-rich effusion
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  • Contributors The main author thanks Liz Bode and Erin O’Connell for their help and support on the development of this interesting case report.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement No additional data are available.

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