UNASSIGNED: A true @entity5 is a rare entity composed of two histologically distinct @entity5 coinciding in the same organ. This paper reports a unique case of cerebral @entity5 consisting of two benign components. On the first hand, @entity1653 which is usually a benign lesion arising from the meningothelial cell in the arachnoidal membrane. On the other, cerebral cavernoma which is a well-circumscribed, @entity4607 within the brain. To our knowledge, there is no previously documented case of cerebral @entity5 consisting of two benign components. A 56-year-old Caucasian male suffered in 2002 from an @entity1653 WHO II   located in the left lateral ventricle. Three years after the @entity5 extirpation, the @entity1 suffered from a @entity1410 in the fourth ventricle due to a recurrently haemorrhaged cavernoma. In 2008, a recurrence of the @entity5 in the left lateral ventricle was discovered. Additionally, another @entity5 located in the quadrigeminal lamina was detected. After surgical resection of the @entity5 in the left lateral ventricle, the pathological examination confirmed the diagnosis of a @entity5 consisting of components of a @entity1653 WHO II   and a cavernoma. Postoperatively, no adjuvant treatment was needed and no @entity5 recurrence is discovered up to the present. A possible explanation for the collision of those two different @entity5 may be migration of @entity5 cells mediated by the cerebrospinal fluid. After 5-years of follow-up, there is no sign of any @entity5 recurrence; therefore, surgical @entity5 removal without adjuvant therapy seems to be the treatment of choice.

Collision Tumor Composed of XXXX and Cavernoma.

@entity1 :: ('9606', 'Species') :: ['patient'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'collision tumor', 'neoplasms', 'tumors'] @entity1653 :: ('MESH:D008579', 'Disease') :: ['meningioma', 'atypical meningioma'] @entity1410 :: ('MESH:D006406', 'Disease') :: ['hematoma'] @entity4607 :: ('MESH:D006222', 'Disease') :: ['benign vascular hamartoma']
@entity1653 :: (MESH:D008579,Disease) :: ['Meningioma']
