Adenomatous Hyperplasia of the Thyroid Gland in Beluga Whales ( Delphinapterus leucas) from the St. Lawrence Estuary and Hudson Bay, Quebec, Canada

We evaluated thyroid gland lesions in beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary ( n = 16) and Hudson Bay ( n = 14). Follicular cysts and nodules of adenomatous hyperplasia of the thyroid gland were found in eight and nine adults from the St. Lawrence Estuary ( n = 10), resp...

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Bibliographic Details
Published in:Veterinary Pathology
Main Authors: Mikaelian, I., Labelle, P., Kopal, M., De Guise, S., Martineau, D.
Format: Article in Journal/Newspaper
Language:English
Published: SAGE Publications 2003
Subjects:
Hudson Bay
Canada
Hudson
Beluga
Beluga*
Delphinapterus leucas
Online Access:http://dx.doi.org/10.1354/vp.40-6-698
https://journals.sagepub.com/doi/pdf/10.1354/vp.40-6-698
https://journals.sagepub.com/doi/full-xml/10.1354/vp.40-6-698
Description
Summary:We evaluated thyroid gland lesions in beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary ( n = 16) and Hudson Bay ( n = 14). Follicular cysts and nodules of adenomatous hyperplasia of the thyroid gland were found in eight and nine adults from the St. Lawrence Estuary ( n = 10), respectively, and in four and six adults from Hudson Bay ( n = 14), respectively. The total volume of the lesions of thyroid adenomatous hyperplasia was positively correlated with age in both populations. Comparison between populations could not be performed because of differences in age structures of sample groups. Beluga whales from both populations have unique thyroid lesions among marine mammals.

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