1. Dermoid Sinus Janae Bickhart and Taylor Whitenight Animal Science
Mrs. Smith-Wells
12 January 2010
Pd. 3

2. What is it?
Dermoid Sinus is formed when the skin does not separate from the spinal cord.
It is a tube like opening, generally in the back area.

3. History/Background
Also known as dermoid, cyst, hair cyst, polynoidal cyst and African cyst
Similar to dermoid cyst but was eventually found to be different
Dermoid:
A tube like structure
Cyst:
An actual cyst containing material

4. Causes Inherited, autosomal recessive trait
Only apparent when offspring receives on defective gene from each parent
Only one defective gene is inherited offspring is carrier but no symptoms

5. Classification Homozygous recessive Punnet square:
DD- No dermoid sinus
Dd- carrier
Dd- dermoid sinus is present

6. Animals affected by Dermoid Sinus
This disease is mostly found in the Rhodesian Ridgeback and Ridgeback crosses.
But is also found in Shih-Tzu's, Boxers, and Kerry Blue Terriers.
Also sometimes found in cats.

7. Signs/Symptoms of Dermoid Sinus
Most often occur on or around the tail or on or around the neck area between the occipital bone and start of ridge
Hard to find
Recommended that a trained person checks the dog or cat for a Dermoid Sinus

8. As shown in the photo below.

9. Prevention and treatment of Dermoid Sinus
In most cases the dog/cat is put to sleep when it becomes extremely infected
Therapy consists in surgical removal of the sinus
Give Mom Folic acid (vitamin B9) a week before mating and during mating through the first trimester; reduces by 72%

10. Work sited http://www.dermoids.com/
sinus/page1.aspx
es.html
nts-PDFs/Dermoid_Sinus_Article.pdf
aqs.html