Bonnet Dechaume Blanc syndrome

Bonnet-Dechaume-Blanc syndrome
Synonyms	Wyburn-Mason syndrome
Pronounce	N/A
Specialty	N/A
Symptoms	Arteriovenous malformations in the brain, retina, and facial skin
Complications	Seizures, vision loss, hemorrhage
Onset	Congenital
Duration	Lifelong
Types	N/A
Causes	Genetic mutations (not fully understood)
Risks	Family history
Diagnosis	MRI, CT scan, Ophthalmoscopy
Differential diagnosis	N/A
Prevention	N/A
Treatment	Symptomatic management, surgery, radiotherapy
Medication	N/A
Prognosis	Variable, depending on severity
Frequency	Rare
Deaths	N/A

Bonnet-Dechaume-Blanc syndrome, also known as Wyburn-Mason syndrome, is a rare congenital disorder characterized by arteriovenous malformations (AVMs) primarily affecting the brain, retina, and facial skin. This condition is named after the French physicians Pierre Bonnet, Jean Dechaume, and Jean Blanc, who first described it in the mid-20th century.

Presentation

Patients with Bonnet-Dechaume-Blanc syndrome typically present with a triad of symptoms due to the presence of AVMs:

• Neurological symptoms: These may include seizures, headaches, and neurological deficits depending on the location and size of the AVMs in the brain.
• Ophthalmological symptoms: AVMs in the retina can lead to vision loss, retinal detachment, or vitreous hemorrhage.
• Facial skin involvement: Cutaneous AVMs may be visible as reddish-blue lesions on the face.

Pathophysiology

The exact cause of Bonnet-Dechaume-Blanc syndrome is not well understood, but it is believed to involve genetic mutations that affect vascular development. The AVMs result from abnormal connections between arteries and veins, bypassing the capillary system, which can lead to increased pressure and risk of bleeding.

Diagnosis

Diagnosis of Bonnet-Dechaume-Blanc syndrome involves a combination of clinical evaluation and imaging studies:

• Magnetic Resonance Imaging (MRI): Used to identify AVMs in the brain.
• Computed Tomography (CT) scan: Can help visualize the extent of AVMs and any associated complications.
• Ophthalmoscopy: Essential for detecting retinal AVMs and assessing their impact on vision.

Management

There is no cure for Bonnet-Dechaume-Blanc syndrome, and treatment focuses on managing symptoms and preventing complications:

• Symptomatic management: Includes medications for controlling seizures and pain.
• Surgical intervention: May be necessary to remove or reduce AVMs, especially if they pose a significant risk of bleeding or neurological damage.
• Radiotherapy: Can be used to shrink AVMs and reduce their impact.

Prognosis

The prognosis for individuals with Bonnet-Dechaume-Blanc syndrome varies widely. Some patients may experience significant complications, while others may have a relatively stable condition with minimal symptoms. Early detection and management are crucial in improving outcomes.

Also see

• Arteriovenous malformation
• Sturge-Weber syndrome
• Parkes Weber syndrome
• Cerebral cavernous malformation