Equis ISSN 2398-2977

Pheochromocytoma

Synonym(s): Phaeochromocytoma

Contributor(s): Han van der Kolk

Introduction

  • A pheochromocytoma is the most frequently diagnosed adrenomedullary neoplasm of equids although the disorder itself is extremely rare.
  • Cause: neoplasm of chromaffin cells or tissue.
  • Signs: profuse sweating, edema, cardiac problems.
  • Treatment: adrenalectomy
  • Prognosis: good to guarded.

Pathogenesis

Etiology

  • Neoplasm of chromaffin cells of either the left or the right adrenal gland.
  • Both adrenal glands may be involved as well.

Pathophysiology

  • The exact cause of the neoplasm is unknown.
  • The clinical signs are largely attributable to the increased production and release of catecholamines.

Timecourse

  • The onset of the disorder is usually reported within four weeks.

Diagnosis

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Treatment

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Johnson P J, Goetz T E, Foreman J H & Zachary J F (1995)Pheochromocytoma in two horses.JAVMA206, 837-841 PubMed.
  • Yovich J V, Horney F D & Hardee G E (1984)Pheochromocytoma in the horse and measurement of norepinephrine levels in horses.Can Vet J25, 21-25 PubMed.
  • Yovich J V & Ducharme N G (1983)Ruptured pheochromocytoma in a mare with colic.JAVMA183, 462-464 PubMed.


ADDED