ABSTRACT
It has been reported that cavernous hemangiomas in the spine are generally located in vertebral bodies. Wereport a case of epidural cavernous hemangioma, a very rare condition, at the C7-T2 level. MR images showed adumbbell-shaped mass, with iso and high signal intensity on T1- and T2-weighted images, respectively. The mass wasintensely enhanced following Gd-DTPA injection.
Subject(s)
Gadolinium DTPA , Hemangioma, Cavernous , SpineABSTRACT
PURPOSE: To evaluate the therapeutic effect of gamma knife radiosurgery in cerebral vascular malformationusing a radiologic imaging method such as MRI or angiography. MATERIALS AND METHODS: We retrospectively reviewedMRIs, Ct scans and angiograms of 29 cases of arteriovenous malformation and 15 of cavernous malformation beforeand after gamma knife radiosurgery. The patients underwent follow-up radiologic studies for between 6 and 35months after radiosurgery. No patient underwent ofter surgery of embolization. Radiological imaging analysisfocused on changes in the volume of the nidus or central core. Other findings of edema, cystic change, hemorrhage,signal intensity, enhancement and distributional vascular markings were also studied. The volume of the AVM niduswas measured and assigned ot one of four groups : 4-10cc and> 10cc. RESULTS: In arteriovenousmalformation cases, the volume of the nidus decreased by mean 60.2%; reduction was greatest(68.1%) in the 1-4ccgroup. Three cases showed complete loss of the nidus at 9, 12 and 25 months after radiosurgery, respectively. Innine cases, dereased caliber or loss of draining vein was noted. High signal intensity on T2-weighted MR images,suggesting either edema or demyelination, was observed in four cases. In cavernous angioma cases, core volume wasreduced by 36.8%. Transient cerebral edema and presumed radiation necrosis were observed in two cases and one,respectively. CONCLUSION: Gamma knife suregery was effective in nearly all cases of arteriovenous malformationand some cases of cavernous malformation. More than two years follow-up involving radiologic imaging such as MRIis needed for the evaluation of therapeutic effect and diagnosis of complications.
Subject(s)
Humans , Angiography , Arteriovenous Malformations , Brain Edema , Demyelinating Diseases , Diagnosis , Edema , Follow-Up Studies , Hemangioma, Cavernous , Intracranial Arteriovenous Malformations , Magnetic Resonance Imaging , Necrosis , Radiosurgery , Retrospective Studies , Tomography, X-Ray Computed , VeinsABSTRACT
Intracranial capillary hemangioma is extremely rare. We report the radiologic findings of this entily in the right middle cranial fossa of a 31-year-old man. The lesion was a well-marginated extra-axial tumor that showed hyperdensity on precontrast CT and homogeneous marked enhancement after contrast infusion. MR imaging showed isointensity with gray matter on T1-WI, hyperintensity of signal on T2-WI, and marked enhancement after gadolinium infusion. On cerebral angiography, irregular narrowing and displacement of the right internal carotid artery by the tumor were seen. The mass showed persistent capillary blush.