Cover Journal of the American Veterinary Medical Association
Journal of the American Veterinary Medical Association
ISSN:
0003-1488
Publication Date:
15 Mar 2016

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Associations between sex, body weight, age, and ultrasonographically determined adrenal gland thickness in dogs with non-adrenal gland illness

Pedro L. Bento DVM, MS1, Sharon A. Center DVM2, John F. Randolph DVM3, Amy E. Yeager DVM4, and Rodrigo C. Bicalho DVM, PhD5
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  • 1 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
  • | 2 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
  • | 3 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
  • | 4 Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
  • | 5 Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
DOI:
https://doi.org/10.2460/javma.248.6.652
Volume/Issue:
Volume 248: Issue 6
Online Publication Date:
15 Mar 2016
Restricted access
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Abstract

OBJECTIVE

To determine whether body weight, age, or sex was associated with ultrasonographically determined adrenal gland thickness (AT) in dogs with non-adrenal gland illness.

DESIGN

Retrospective cross-sectional study.

ANIMALS

266 dogs (22 sexually intact and 119 castrated males and 19 sexually intact and 106 spayed females representing 12 breeds) with non-adrenal gland illness.

PROCEDURES

Thickness of the caudal pole of the left and right adrenal glands was measured on longitudinal ultrasonographic images. Dogs were stratified into age and body weight categories to investigate associations with AT.

RESULTS

AT was significantly lower in dogs that weighed ≤ 12 kg (26.4 lb) than in dogs that weighed > 12 kg and left AT increased with age. Both left and right AT were larger in male than in female dogs that weighed > 12 to ≤ 20 kg, and left AT was larger in male than in female dogs that weighed > 20 to ≤ 30 kg.

CONCLUSIONS AND CLINICAL RELEVANCE

Results suggested that body weight, age, and sex were significantly associated with AT, indicating that these variables should be considered when evaluating AT in dogs with non-adrenal gland illness and when developing reference intervals for AT in dogs. Further, findings indicated that dogs with non-adrenal gland illness that weigh ≤ 12 kg should have an AT no greater than 0.62 cm, whereas dogs that weigh > 12 kg should have an AT no greater than 0.72 cm.

Contributor Notes

Dr. Bento's present address is College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824.

Address correspondence to Dr. Bento (palbento@gmail.com).