Open Fontanel in Dogs

Open fontanel is when the soft spot on a puppy’s skull, which is present at birth, fails to close as the dog matures, leaving a vulnerable area on the head
Condition Snapshot
  • Name:

Open Fontanel

  • Other Name(s):

Soft Spot, Incomplete Skull Closure
  • Acronym(s):

OF
  • Severity:

/5
  • Genetic:

Yes
  • Idiopathic:

No
  • Predisposed Breeds:

Yes
  • Onset Age:

Puppy

Overview

Open fontanel, also known as soft spot or incomplete skull closure, is a condition where the soft spot on a puppy’s skull remains open as the dog matures. This leaves a vulnerable area on the head, which can lead to potential health issues. This condition is relatively uncommon, but it is more often seen in certain small and toy breeds. The severity of open fontanel varies. In mild cases, it may not cause significant problems, while in severe cases, it can lead to neurological issues or increased risk of injury.

Causes

The primary cause of open fontanel is genetic predisposition, especially in breeds with domed skulls. This genetic factor makes certain breeds more susceptible to the condition, highlighting the importance of careful breeding practices.

Secondary causes may include developmental issues during gestation or nutritional deficiencies affecting bone growth. These factors can prevent the skull from closing properly, resulting in an open fontanel.

Other causes can involve trauma or infections that affect skull development. Ensuring puppies receive proper care during their early development can help mitigate these risks.

Predisposed Breeds

Breeds predisposed to open fontanel include:

Symptoms

The primary symptom of open fontanel is a noticeable soft spot on the top of the dog’s head that does not close. This soft spot is usually detectable by touch and may be visible.

Secondary symptoms can include neurological signs such as seizures, lethargy, or difficulty walking if the brain is affected. These symptoms require immediate veterinary attention to prevent further complications.

Other symptoms may include abnormal skull shape or sensitivity when the area is touched. This sensitivity can be a sign of discomfort or potential underlying issues.

Open fontanel symptoms include:

  • Persistent soft spot on the head
  • Seizures
  • Lethargy
  • Difficulty walking
  • Abnormal skull shape
  • Sensitivity to touch
  • Neurological signs

Diagnosis

Diagnosing open fontanel involves a thorough physical examination by a veterinarian. The veterinarian will check for a soft spot and assess any related symptoms.

Imaging techniques like X-rays or ultrasounds may confirm the diagnosis. These tests help evaluate the extent of the condition and rule out other potential causes.

Open fontanel should be differentiated from conditions like hydrocephalus, craniosynostosis, and brain herniation. Proper diagnosis makes sure the correct treatment plan is followed.

Treatment

Treatment for open fontanel may not be necessary if the dog is asymptomatic. In such cases, regular monitoring is essential to ensure the condition does not worsen.

In severe cases, surgical intervention may be required to protect the brain. Surgery aims to close the open area and prevent potential injury or neurological issues.

Tip: Consult a veterinarian for advice on whether treatment is necessary based on the severity of open fontanel in your dog.

Management

Managing open fontanel involves monitoring the dog for any neurological symptoms. Regular check-ups can help detect changes early and prevent complications.

Protecting the dog’s head from trauma is important to prevent injury. Using protective gear or reducing rough play can help safeguard the vulnerable area.

Tip: Keep your dog’s environment safe and avoid situations where the head may be injured.

Prevention

There is no specific prevention for open fontanel, but responsible breeding practices can help reduce the incidence in certain breeds. Breeders should avoid breeding dogs with a history of the condition.

Early detection through regular veterinary check-ups can help manage the condition effectively. This proactive approach allows for timely intervention if symptoms worsen.

Tip: Support breeders who prioritize health testing to reduce the incidence of open fontanel in future generations.
Sources
  • Open Fontanelle in Small Breed Puppies | VCA Animal Hospitals: https://vcahospitals.com/know-your-pet/open-fontanelle-in-small-breed-puppies. Accessed September 27, 2023.
  • Veterinary Partner – VIN: https://www.vin.com/doc/?id=4952484&pid=17256. Accessed September 27, 2023.
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