Branchial Tumor in a Blue Striped Grunt (Haemulon sciurus)

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Branchial Tumor in a Blue Striped Grunt
(Haemulon sciurus)

• Jason Kimbro, DVM
• Clinical Instructor, Pathology
• Disneys Animal Programs/UF College of Veterinary
  Medicine

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D08-62 Blue Striped Grunt

• Signalment
• Adult female Blue striped grunt
• Hx
• Large mass at opening of the left operculum
• Aspirate revealed neoplastic cells
• Biopsy revealed an invasive thyroid tumor

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D08-62 Blue Striped Grunt

• NX
• Large mass, caudal left branchial cavity
• Mass adherent to body wall and branchial arches
• Nephroliths in the caudal kidney
• Histo
• Follicular carcinoma, thyroid gland
• Nephrocalcinosis, chronic, multifocal severe,
  with tubular necrosis and granulomatous
  inflammation, caudal kidney.

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Discussion

• Neoplasia is rare in fish
• Thyroid tumors one of most common
• Locally invasive
• Metastasis is rare
• Originate at ventral branchial arch
• Nephrocalcinosis
• Systemic acidosis
• Tubular Ca salt precipitation
• Tubuloepithelial degeneration/necrosis
• Secondary granulomatous inflammation

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References

1. Harada, T, Itoh H, Hatanaka, J, Kamiya, S, and
   Enomoto, M (1996). A morphological study of a
   thyroid carcinoma in a medaka, Oryzias latipes
   (Temminck Schlegel), Journal of Fish Diseases
   19(2) 271-277.
2. Roberts RJ (2004). Fish Pathology. W.B.
   Saunders, Philadelphia, PA.
3. Smart, GR, Knox, D, Harrison, JG, Ralph, JA,
   Richards, RH, and Cowey, CB (1979).
   Nephrocalcinosis in rainbow trout Salmo gairdneri
   Richardson the effect of exposure to elevated
   CO2 concentrations, Journal of Fish Diseases
   2(4) 279-289.
4. Stoskopf MK (1993). Fish Medicine. W.B.
   Saunders, Philadelphia, PA.

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Questions considered here.