Difference between revisions of "Equine Internal Medicine Q&A 21"

From WikiVet English
Jump to navigation Jump to search
(Created page with "{{Template:Manson Mair}} centre|500px<br> <br /> '''You are asked to examine an 18-year-old Warmblood gelding that has developed ...")
 
 
(2 intermediate revisions by 2 users not shown)
Line 18: Line 18:
 
Hypothyroidism in foals is usually associated with prognathism, ruptured tendons, forelimb contracture, delayed ossification of the carpal and tarsal bones, and goitre. The prognosis is extremely poor. <br><br>
 
Hypothyroidism in foals is usually associated with prognathism, ruptured tendons, forelimb contracture, delayed ossification of the carpal and tarsal bones, and goitre. The prognosis is extremely poor. <br><br>
 
The clinical signs of hypothyroidism in adult horses are cessation of growth, hypothermia, lethargy, irregular areas of alopecia and thickened face.
 
The clinical signs of hypothyroidism in adult horses are cessation of growth, hypothermia, lethargy, irregular areas of alopecia and thickened face.
|l1=
+
|l1=Hypothyroidism
 
|q2=Which three thyroid hormones can you name, and how are they controlled?
 
|q2=Which three thyroid hormones can you name, and how are they controlled?
 
|a2=
 
|a2=
Line 29: Line 29:
 
There is a slight diurnal variation in thyroid hormone concentrations with low concentrations during the night. <br><br>
 
There is a slight diurnal variation in thyroid hormone concentrations with low concentrations during the night. <br><br>
 
Thyroid hormones regulate cell growth and differentiation, and regulate energy metabolism.
 
Thyroid hormones regulate cell growth and differentiation, and regulate energy metabolism.
|l2=
+
|l2=Thyroid Gland - Anatomy & Physiology#Thyroid Hormone Physiology
 
|q3=Does diet influence the plasma concentrations of these hormones?
 
|q3=Does diet influence the plasma concentrations of these hormones?
 
|a3=
 
|a3=
Line 45: Line 45:
 
*Serum thyroid hormone concentrations are decreased following concurrent disease and the administration of phenylbutazone (T4 only).  
 
*Serum thyroid hormone concentrations are decreased following concurrent disease and the administration of phenylbutazone (T4 only).  
 
*However, the administration of dexamethasone does not change baseline T3 and T4 concentrations.
 
*However, the administration of dexamethasone does not change baseline T3 and T4 concentrations.
|l3=
+
|l3=Thyroid Gland - Anatomy & Physiology#Influence of External Factors
 
|q4=What is the euthyroid sick syndrome?
 
|q4=What is the euthyroid sick syndrome?
 
|a4=
 
|a4=
Line 51: Line 51:
 
*Disease unrelated to thyroid disease can depress basal thyroid hormone levels as a normal response to minimize the catabolic effects of thyroid hormone during disease.  
 
*Disease unrelated to thyroid disease can depress basal thyroid hormone levels as a normal response to minimize the catabolic effects of thyroid hormone during disease.  
 
*In cases of euthyroid sick syndrome, low baseline T3 and T4 concentrations respond normally to TSH administration.
 
*In cases of euthyroid sick syndrome, low baseline T3 and T4 concentrations respond normally to TSH administration.
|l4=
+
|l4=Hypothyroidism
 
 
 
 
 
</FlashCard>
 
</FlashCard>
  

Latest revision as of 17:30, 3 September 2011


Mansonlogo This question was provided by Manson Publishing as part of the OVAL Project. See more Equine Internal Medicine questions




Equine Internal Medicine Q&A 20.jpg



You are asked to examine an 18-year-old Warmblood gelding that has developed progressive alopecia, which started in the neck region. Haematological evaluation reveals a haematocrit of 30% (n = 36–42%) and a normal leucocyte count (8.9x109/l with 21% lymphocytes, 1% eosinophils and 78% neutrophils). The total serum protein concentration is normal (81g/l with 31.7% albumin, 14.3% alpha-globulins, 29.4% beta-globulins and 24.6% gamma-globulins). Basal T4 concentration is low.


Question Answer Article
What is the most likely endocrinopathy to cause these lesions? Link to Article
Which three thyroid hormones can you name, and how are they controlled? Link to Article
Does diet influence the plasma concentrations of these hormones? Link to Article
What is the euthyroid sick syndrome? Link to Article


Next questionNext Question.png