Fontanelle Persistence
Fontanelle persistence is the failure of the soft spot on the skull to close by the expected age, increasing the risk of head trauma.
Detailed Description
Normally, the fontanelle closes by 9–12 weeks of age. In some small breeds, delayed or incomplete closure is more common, possibly due to selective breeding for small size or domed skulls. This anatomical feature does not cause symptoms itself but increases vulnerability to injury.
Common Symptoms
- Palpable soft spot on top of the head
Management Options
- No treatment needed unless trauma occurs
- Protect the dog’s head from injury
Frequently Asked Questions
Is an open fontanelle dangerous?
Not inherently, but it increases the risk of head injury.
Will the fontanelle close as the dog ages?
Usually by 12 weeks; if not, it may remain open for life.
Should rough play be avoided with puppies with open fontanelles?
Yes, especially if the fontanelle is open.
Can an open fontanelle be surgically closed?
No, surgery is not performed for this.
Is this a reason not to breed a dog?
Yes, persistent open fontanelle is a disqualifying fault.
Condition Details
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Typical Age of Onset
Present at birth; persists if not closed by 12 weeks
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Testing Available
Yes
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Diagnosing Methods
Palpation during veterinary exam
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Preventative Measures
Avoid breeding dogs with persistent fontanelles
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Related Conditions
Hydrocephalus