Glomuvenous Malformation | Symptoms & Causes
What are the symptoms of glomuvenous malformation?
Glomuvenous malformations typically appear on the skin, most commonly on fingers and toes. In some cases, they can involve the mucous membranes, such as the inside of the mouth or extend into fat and muscles.
At first, a glomuvenous malformation looks like a raised pink or blue patch that feels bumpy to the touch. Over time, they tend to thicken and become more bluish in color, resembling a raised bruise.
These malformations vary in size and may develop at any age. GVMs can be painful with or without touch. Pain may be caused by:
- getting bumped or hit
- direct pressure
- extreme temperature changes (because they are associated with an abnormal growth of cells that regulate body heat)
Sclerotherapy, surgery, and medications are treatment options that relieve and reduce pain.
What causes a glomuvenous malformation?
Glomuvenous malformations are frequently hereditary. Researchers have identified mutations in the glomulin gene in the majority of GVM cases. If a child has a hereditary form, it means at least one parent carries the mutated gene.
While GVMs may run in families, they can present differently from one person to the next. Some family members may have less prominent lesions, while another may have multiple or extensive malformations.
Glomuvenous Malformation | Diagnosis & Treatments
How are glomuvenous malformations diagnosed?
Your visit will start with a complete medical history and a physical exam. In most cases, the physician will be able to diagnose your child’s glomuvenous malformation with a thorough examination. However, further testing will be necessary to determine the extent of the disease and therefore the best treatment course.
The best imaging test for seeing deeper lesions is an MRI (magnetic resonance imaging). An MRI is a high-resolution scan that shows the exact location and depth of your child’s malformation and can identify abnormalities in nearby blood vessels.
Our team uses this information to develop customized treatment plans that will best target your child’s GVM.
How are glomuvenous malformations treated?
Treatment depends on how many lesions your child has, as well as their size, location, and severity.
The primary goal of treatment is to relieve your child’s symptoms, such as the pain often associated with GVMs.
Our team will surgically remove a glomuvenous malformation whenever possible. However, because many GVMs tend to be large, deep, or spread out, your child’s treatment course may include other options to shrink and lighten the lesion.
Treatments may include:
- Sclerotherapy: This minimally invasive (non-surgical) treatment involves injecting a liquid medication into a vascular malformation that causes it to shrink over time.
- Medication (sirolimus): This oral medication is an immunosuppressant that improves symptoms, including pain, and improves skin appearance. After treatment with sirolimus, GVMs tend to be softer and less discolored.
- Surgery: Patients with small GVMs that can be completely removed are candidates for surgery.
- Pulsed dye laser: This treatment uses a laser device that destroys abnormal blood vessels without damaging surrounding skin. It does not penetrate into deeper layers of the skin.
What is the long-term outlook for glomuvenous malformation?
Prognosis varies from one person to the next, depending on the size, location, and severity of the malformations.
Because GVMs tend to become darker and thicker over time, they respond best to treatment when diagnosed early. Not all GVMs respond to treatments the same way. That is why our customized treatment approach takes into account your child’s unique needs and makes adjustments as needed.
