Equis ISSN 2398-2977

Gastrointestinal: neoplasia - melanoma

Contributor(s): Prof Derek Knottenbelt, Rachel Murray, Prof Jonathon Naylor, Anna Hollis

Introduction

See Intestinal neoplasia: tumor types table.
Print off the Owner factsheet on Cancer in horses to give to your clients.

Pathogenesis

Predisposing factors

General

  • In general, gray horses are predisposed to the development of melanomas, which can occur in non-dermal locations, but do not necessarily mean metastasis.
  • Melanomas in non-gray horses are often more aggressive in their behavior.

Pathophysiology

  • Most are benign tumors.
  • Some become very aggressive.
  • Pink tumor tissue reflects high potential malignancy rating.

Timecourse

  • Short course if highly malignant.
  • Protracted course is more common.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Henson F M D & Dobson J M (2004) Use of radiation therapy in the treatment of equine neoplasia. Equine Vet Educ 16 (6), 315-318 VetMedResource.
  • May K A & Howard R D (2001) Exercise intolerance secondary to parotid melanomas in a mare. Equine Vet Educ 13 (4), 195-197 VetMedResource.
  • East L M, Savage C J & Traub-Dargatz (1999) Weight loss in the horse - focus on abdominal neoplasia. Equine Vet Educ 11 (4), 174-178 VetMedResource.
  • Hillyer M H (1994) The use of ultrasonography in the diagnosis of abdominal tumours in the horse. Equine Vet Educ 6 (5), 273-278 VetMedResource.
  • Marr C M (1994) Clinical manifestations of neoplasia. Equine Vet Educ 6 (2), 65-71 VetMedResource.
  • Proudman C J & Baker S J (1994) Gastric disease in the adult horse - a clinical perspective. Equine Vet Educ 6 (4), 178-184 VetMedResource.


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