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Visualization of Cellular Electrical Activity in Zebrafish Early Embryos and Tumors
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Neuronal embryonal tumors in fish.

R A Kagan1, M E Pinkerton, M J Kinsel

  • 1University of Illinois Zoological Pathology Program, Loyola University, Maywood, Illinois, USA. Bkagan@sandiegozoo.org

Veterinary Pathology
|March 31, 2010
PubMed
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This study details 11 cases of fish eye and skin tumors, identifying them as neuronal embryonal neoplasms. These aggressive tumors, resembling retinoblastomas, can recur after removal and spread to the other eye.

Area of Science:

  • Comparative Pathology
  • Aquatic Animal Medicine
  • Ophthalmology

Background:

  • Neuronal embryonal neoplasms are rare in fish.
  • Understanding these tumors is crucial for captive aquatic animal health.

Purpose of the Study:

  • To describe the clinical, histological, and ultrastructural features of neuronal embryonal neoplasms in teleost fish.
  • To investigate the origin and behavior of these neoplasms.

Main Methods:

  • Case series review of 11 captive adult teleost fish with neoplasms.
  • Histological and ultrastructural examination of tumor tissues.
  • Clinical observation of tumor presentation, progression, and recurrence.

Main Results:

  • 11 cases of neuronal embryonal neoplasms identified in teleost fish.

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  • Neoplasms occurred in eyes (8/11) and skin (3/11).
  • Ocular tumors showed features of retinoblastoma and teratoid medulloepithelioma; cutaneous tumors originated from electroreceptors.

    • Conclusions:

    • Neuronal embryonal neoplasms in fish share features with mammalian retinoblastomas.
    • These neoplasms are locally aggressive with a high recurrence rate.
    • Further research is needed to understand the etiology and treatment of fish neuronal embryonal neoplasms.