Search the Health Library
Get the facts on diseases, conditions, tests and procedures.
I Want To...
Find a Doctor
I Want To...
Find Research Faculty
Enter the last name, specialty or keyword for your search below.
Cavernous Malformations (Cavernomas)
What is a cavernous malformation (CM)?
A cavernous malformation (abbreviated as CM or also called cavernomas) is an abnormal cluster of capillaries and venules that periodically bleed and give rise to a "popcorn-like" lesion in the brain or spinal cord with very thin walls that contains blood of different ages. CMs are also known as cavernoma, cavernous angioma, cavernous hemangioma or capillary hemangioma. They have also been called "angiographically occult" or "occult" arteriovenous malformations.
Symptoms of cavernous malformations (CM)
Johns Hopkins estimates that less than one percent of people are born with a brain or spinal cord lesion that eventually becomes a CM. They can be hereditary, which means that they have been passed from the parents to their children. Most CMs declare themselves by causing seizures, headaches or with a large bleed.
Diagnosis of cavernous malformations (CM)
We typically first find the CM in a computed tomography (CT) scan, or more commonly in a magnetic resonance imaging (MRI) scan. The appearance of the cavernous malformation on the MRI is very characteristic. An angiogram is usually not necessary.
Treatment for cavernous malformations (CM)
At Johns Hopkins, we treat CMs by microsurgical resection whenever indicated. Most CMs, however, do not need surgery and can simply be followed with yearly MRIs. During microsurgical resection, we perform a craniotomy and, using a microscope, remove the CM from the brain or spinal cord. We do not recommend stereotactic radiotherapy (also called “gamma knife” or stereotactic radiosurgery) as a treatment for CMs.
For more information, contact the Johns Hopkins Cerebrovascular Center at 410-955-2228.
Request an Appointment
To request an appointment or refer a patient, please call:
Adult Neurology: 410-955-9441
Pediatric Neurology: 410-955-4259
Adult Neurosurgery: 410-955-6406
Pediatric Neurosurgery: 410-955-7337
Already a Patient?
Traveling for Care?
Whether you're crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.