Publication year: 2011
Source: World Neurosurgery, Available online 24 December 2011
Bo Wu, Weidong Liu, Yuan Zhao
BackgroundThe coexistence of cavernous malformations (CMs) and developmental venous anomalies (DVAs) in the cerebellopontine angle (CPA) is exceedingly rare. To the authors' knowledge, only 1 case of CPA CM with concurrence of a neighboring DVA has been reported to date.Case DescriptionThe authors presented such vascular malformations in a 36-year-old man with progressive CPA syndrome over 6 weeks. Preoperative neuroimaging suggested the diagnosis of an extra-axial hemorrhagic lesion in the CPA cistern with a cerebellar DVA in the close vicinity. The lesion was totally removed with the DVA untouched and was confirmed to be extra-axial in intimate contact with only the VII-VIII complex and the draining veins of DVA. Pathology revealed a CM. The patient underwent partial improvement in neurological function postoperatively. The radiographic follow-up at 1 year revealed no recurrence.ConclusionCMs should be considered in the differential diagnosis of any extra-axial hemorrhagic mass, especially with a DVA in the proximity. The coexistence of CM and DVA in CPA, although maybe just a coincidence, suggests the possibility of a new subtype of extra-axial CPA CM secondary to a preexisting DVA. A long-term follow-up is justified in discovering the potential mechanism and biology of such uncommon vascular malformations.
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