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The management of arteriovenous malformations of the corpus callosum
Insights
Arteriovenous malformations (AVMs) of the corpus callosum are rare but can cause serious bleeding. Surgical treatment for these AVMs demonstrated satisfactory outcomes with low morbidity and no mortality.
Area of Science:
- Neurology
- Neurosurgery
- Radiology
Background:
- Arteriovenous malformations (AVMs) of the corpus callosum represent a specific subtype of intracranial vascular malformations.
- These lesions, though rare, pose significant diagnostic and therapeutic challenges due to their location and potential for hemorrhage.
Purpose of the Study:
- To analyze the characteristics, clinical presentation, and management outcomes of arteriovenous malformations (AVMs) specifically affecting the corpus callosum.
- To evaluate the efficacy and safety of surgical intervention versus conservative management for these lesions.
Main Methods:
- Retrospective review of 15 cases of corpus callosum AVMs identified over a 30-year period.
- Classification of AVMs based on the affected region of the corpus callosum (genu, truncus, splenium).
- Angiographic analysis of vascular supply and drainage patterns; clinical data review for presentation and outcomes.
Main Results:
- Corpus callosum AVMs constituted 9% of all intracranial AVMs studied. The splenium was the most frequently involved region.
- Subarachnoid Hemorrhage (SAH) was the predominant presenting symptom, often recurrent. Neurological and seizure symptoms were infrequent.
- Surgical treatment in 11 patients yielded satisfactory results with no mortality and low morbidity, contrasting with conservative management outcomes.
Conclusions:
- Arteriovenous malformations of the corpus callosum, particularly those involving the splenium, present with a high risk of Subarachnoid Hemorrhage (SAH).
- Surgical intervention is recommended as the primary treatment modality for corpus callosum AVMs due to favorable outcomes and reduced complication rates compared to conservative approaches.
Abstract:
A series of 15 arteriovenous malformations (AVMs) of the corpus callosum--9% of 170 intracranial AVMs admitted to the School of Medicine of the University of Rome during a 30-yr period--was studied. In all cases the lesion concerned mainly the corpus callosum, although in some it also involved the surrounding structures, such as septum pellucidum, tela choroidea, and the mesial hemisphere. These malformations are divided into three groups, namely, those involving mainly the genu, the truncus, or the splenium of the corpus callosum. The last predominated in the present series. Each type has a peculiar angiographic appearance. In general these lesions are fed by branches from the anterior cerebral and/or posterior cerebral arteries, although in some cases minor contributions from the middle cerebral artery may also be present. Vascularization is often bilateral. Venous drainage occurs through the inferior and/or superior sagittal sinuses and/or the Galen system. As to clinical presentation, Subarachnoid Hemorrhage (SAH) is the usual presenting symptom and tends to recur frequently. Neurological localizing symptoms are infrequent, as are seizures; psychological symptoms are an exception. Of the 4 cases managed conservatively, only one had no further episodes of bleeding and remained free of complaints. On the other hand, surgical results of the 11 operated patients were satisfactory, in the sense that no mortality and low morbidity were recorded. Accordingly, surgical treatment of AVMs of the corpus callosum is recommended as a rule.