====== Cerebral Cavernous Malformation Associated Developmental Venous Anomaly ======

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A **[[cerebral cavernous malformation]] (CCM)** associated with a **[[developmental venous anomaly]] (DVA)** refers to the coexistence of two distinct cerebral vascular malformations.

===== 🧠 Cerebral Cavernous Malformation (CCM) =====
  * Cluster of abnormally dilated, thin-walled capillaries.
  * Lacks intervening normal brain parenchyma.
  * Low-flow lesion with risk of microhemorrhages or overt bleeding.
  * Clinical presentations:
    * Seizures
    * Focal neurological deficits
    * Incidental finding on MRI

===== 💧 Developmental Venous Anomaly (DVA) =====
  * Most common type of cerebral vascular malformation.
  * Characterized by radially arranged medullary veins draining into a central trunk.
  * Typically benign and asymptomatic.
  * Found incidentally in most cases.

===== 🔗 Association Between CCM and DVA =====
  * Up to **20–30%** of CCMs are associated with a DVA.
  * Hemodynamic stress from the DVA may contribute to CCM formation or hemorrhage.
  * **Surgical relevance:** DVAs drain normal brain tissue → **must not be resected** during cavernoma surgery.

===== Diagnosis =====
[[Cerebral Cavernous Malformation Associated Developmental Venous Anomaly Diagnosis]]

===== 🛑 Clinical Note =====
> Surgical planning must **preserve the DVA** to prevent venous infarction. Only the cavernoma should be targeted for resection if symptomatic.