Felis ISSN 2398-2950

Ear: ceruminous cystomatosis

Synonym(s): Benign melanotic ceruminous gland adenomas, multi-centric or focal ceruminous adenomas, apocrine hyperplasia

Contributor(s): David Godfrey, Tim Nuttall

Introduction

  • Cause: unknown. This is considered a syndrome rather than a disease having a single known cause.
  • Signs: blue cystic masses around the entrance to the ear canal.
  • Diagnosis: examination, histopathology.
  • Treatment: none, surgery or laser treatment.
  • Prognosis: generally good, many cats need no treatment. There is some link to malignancy.

Pathogenesis

Etiology

  • Unknown.
  • It may be a degeneration.
  • There are rare cases that appear congenital.

Predisposing factors

General

  • It might be a consequence of chronic otitis externa in some cats.
  • There has also been speculation that a feline papillomavirus Papillomavirus is involved but it usually is absent.

Pathophysiology

  • Seems to be a degeneration.

Timecourse

  • Often slowly progress over months to years.

Epidemiology

  • A sporadic condition usually of older cats.

Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Corriveau L A (2012) Use of a carbon dioxide laser to treat ceruminous gland hyperplasia in a cat. J Fel Med Surg 14 (6), 413-416 PubMed.
  • Murayama N, Sakakibara K & Nagata M (2006) Juvenile onset feline ceruminous cystomatosis in a Maine coon. Japan J Vet Dermatol 12 (4), 239-241 VetMedResource.

Other sources of information

  • Miller W H, Griffin C E and Campbell K L (2013) Diseases of eyelids, claws, anal sacs, and ears. In: Muller and Kirk’s Small Animal Dermatology 7th edition. Elsevier, St Louis. p 752.
  • Loft K E (undated) Feline Apocrine Cysts (Cystomatosis) (12 cases) 2011-2013 https://www.mspca.org/angell_services/feline-apocrine-cysts-cystomatosis-12-cases-2011-2013/ Accessed 16th December 2015.
  • Griffin C E (2009) Feline otology. Proceedings of North American Veterinary Conference 2009
  • Gross T L et al (2005) Sweat gland tumours. In: Skin Diseases of the Dog and Cat: Clinical and Histopathological Diagnosis. Blackwell Science, Ames. pp 665-694.
  • Harvey R G, Harari J and Delauche A J (2001) Ear Diseases of the Dog and Cat. Iowa State University Press, Ames.


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