cavernous malformations, venous malformations, and capillary telangiectasias richard e. clatterbuck,...
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Cavernous Malformations, Venous Malformations, and Capillary Telangiectasias
Richard E. Clatterbuck, M.D., Ph.D.
Department of Neurological Surgery
The Johns Hopkins University School of Medicine
Cavernous Malformations
• Abnormal vascular channels lined by endothelial cells (cells that line all blood vessels) but lacking other components of typical blood vessel walls
• Have been described as having an appearance similar to mulberries
AKA
• Cavernous angioma
• Cavernous hemangioma
• Cerebral angioma
• Cavernoma
• Cavmals
• CCMs (cerebral cavernous malformations)
Radiographic Appearance
• Classically described as a “popcorn” lesion with a reticulated appearance on MRI scans
Epidemiology
• Occur in 0.5% of the population (1 in 200 people) and may represent 10% of vascular malformations
• Perhaps slightly more prevalent in females, 1.8:1 in our series
Presentation
• Mean age 34.6 years (7.8-78.5)
• Average of 3.4 lesions per patient, solitary in 63% and multiple in 25%
• 19% had venous malformations
• 4% had capillary telangiectasias
• Headache (65%), seizures (49%), focal deficits (46%), hemorrhage (13%), asymptomatic (1.5%)
Hemorrhage rates
• 3.1% per patient year hemorrhage rate
• 0.9% in males
• 4.2% in females
• No difference in lesions in the cerebrum or brainstem
Seizure rates
• 4.8% per patient year
• 2.4% new onset seizure rate per patient year
• 5.5% recurrent seizure rate per patient year
Venous malformation
• Persistence of a developmentally expressed venous drainage pattern
• Classically described as a caput medusae appearance
AKA
• Developmental venous anomaly (DVA)
• Venous anomaly
• Venous angioma
• Venous malformation
Presentation
• Mean age 39.1 years (18.7-73)
• 19% had another cerebrovascular malformations
• Headache (50.8%), seizures (30.2%)
Hemorrhage rate
• 0.15% per lesion year
Capillary Telangiectasia
• Normal capillary structurally at the cellular level but abnormal in size, dramatically dilated
AKA
• Capillary malformations
• Captels
Presentation
• Much rarer lesions with unclear although certainly low hemorrhage rate
• Present throughout life but typically in 3rd or 4th decade
• Symptoms include headache, numbness, dizziness, visual disturbance
How are these related?
Cerebral Vascular Malformations
• Cavernous malformation
• Venous malformation
• Capillary telangiectasia
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