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Intracranial dermoid cyst mimicking hemorrhage

Case report and review of the literature

Rene O. Sanchez-Mejia, Mary Limbo, Tarik Tihan, Michael G. Galvez, Meredith V. Woodward, and Nalin Gupta

demonstrate increased T 1 - and variable T 2 -weighted signal. 15 Infrequently, the cyst contents can be hyperdense, 6 , 13 , 15 mimicking a hemorrhage. It is important to recognize the unusual imaging characteristics of some dermoid cysts because they are managed differently from posterior fossa hemorrhages. Case Report History and Examination This 16-year-old boy presented with a history of chronic headaches that had recently increased in severity and frequency. On physical examination, he was found to have no neurological deficit or midline cutaneous

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J. Bradley White, David G. Piepgras, Bernd W. Scheithauer, and Joseph E. Parisi

H , Ohtsuki H , Obashi J , Fujiwara M , Sakurai M : Cerebral neoplasms initially presenting with massive intra-cerebral hemorrhage . Surg Neurol 22 : 57 – 62 , 1984 3 Charles NC , Nelson L , Brookner AR , Lieberman N , Breinin GM : Pilocytic astrocytoma of the optic nerve with hemorrhage and extreme cystic degeneration . Am J Ophthalmol 92 : 691 – 695 , 1981 4 Devi BI , Shukla D , Bhat D , Santosh V : Hypothalamic tumour with haemorrhage . Childs Nerv Syst 17 : 567 – 569 , 2001 5 Golash A , Thorne J

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Paul A. Gardner, Johnathan Engh, Dave Atteberry, and John J. Moossy

puncture is not as safe as Dandy believed. The 2 most common complications of ventriculostomy drain placement are infection and hemorrhage. 5 , 9 Studies on incidence, prevention, and management of EVD catheter infection are widespread; multiple techniques and protocols have been presented in an attempt to minimize EVD-related infections, most asserting that the duration of drainage is correlated with infection rates. 5 , 6 , 8 , 9 , 11 In fact, there is a growing trend among medical device manufacturers to produce and prove the efficacy of antibiotic

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Reuben Plotkin, Michael Ronthal, and Colin Froman

–122. 5. Henson , R. A. , and Croft , P. B. Spontaneous spinal subarachnoid haemorrhage. Q. Jl Med. , 1956 , 25 : 53 – 66 . Henson , R. A., and Croft , P. B. Spontaneous spinal subarachnoid haemorrhage. Q. Jl Med. , 1956, 25: 53–66. 6. Kerr , A. S. Sudden paraplegia. J. Bone Jt Surg. , 1954 , 36B : 352 – 353 . Kerr , A. S. Sudden paraplegia. J. Bone Jt Surg. , 1954, 36B: 352–353. 7. King , O. J. , Jr. , and Glas , W. W. Spinal subarachnoid hemorrhage following lumbar

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Arden F. Reynolds Jr., A. Basil Harris, George A. Ojemann, and Paul T. Turner

, Conforto C , Sacco G : Aphasia in thalamic haemorrhage. Lancet 1 : 1052 , 1969 (Letter) Bugiani O, Conforto C, Sacco G: Aphasia in thalamic haemorrhage. Lancet 1: 1052, 1969 (Letter) 5. Ciemins VA : Localized thalamic hemorrhage. A cause of aphasia. Neurology 20 : 776 – 782 , 1970 Ciemins VA: Localized thalamic hemorrhage. A cause of aphasia. Neurology 20: 776–782, 1970 6. Fisher CM : The pathologic and clinical aspects of thalamic hemorrhage. Trans Am Neurol Assoc 84

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Oren N. Gottfried, Daniel W. Fults, Jeannette J. Townsend, and William T. Couldwell

astrocytoma presenting as a spontaneous intracerebral haemorrhage in a child. Br J Neurosurg 12 : 59 – 62 , 1998 Golash A, Thorne J, West CG: Low-grade pilocytic astrocytoma presenting as a spontaneous intracerebral haemorrhage in a child. Br J Neurosurg 12: 59–62, 1998 11. Kondziolka D , Bernstein M , Resch L , et al : Significance of hemorrhage into brain tumors: clinicopathological study. J Neurosurg 67 : 852 – 857 , 1987 Kondziolka D, Bernstein M, Resch L, et al: Significance of hemorrhage into brain

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Jay Jagannathan, John A. Butman, Russell R. Lonser, Alexander O. Vortmeyer, Christopher K. Zalewski, Carmen Brewer, Edward H. Oldfield, and H. Jeffrey Kim

not detectable on routine imaging studies and that the mechanisms that underlie symptom formation may include tumor-related endolymphatic hydrops and/or intralabyrinthine hemorrhage. 1 , 7 , 10 However, these hypotheses have not been confirmed by imaging studies or clinical experience. We describe a unique case involving a patient with VHL disease and audiovestibular dysfunction who was discovered at the time of surgery to have a small ELST and in whom neuroimaging revealed no abnormal finding other than intralabyrinthine hemorrhage. Case Report History and

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Ashok Mahade Hande and Anil Pandurang Karapurkar

arachnoid cysts, postulating temporal lobe agenesis as the cause. All of Robinson's cases of intracranial arachnoid cysts were strictly intradural. Five cases of intradiploic arachnoid cysts have been reported. 3, 11, 14 We describe the case of a patient presenting with hemorrhage into a massive intracranial extradural arachnoid cyst. Case Report This 35-year-old man had the sudden onset of headache, nausea, and vomiting 1 year prior to admission. He was treated with intravenous fluids at a municipal hospital in another city, after which he recovered and was

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Yoji Tamura, Teppei Uesugi, Adam Tucker, Tohru Ukita, Masao Tsuji, Hiroji Miyake, and Toshihiko Kuroiwa

C olloid cysts of the third ventricle are benign tumors and a well-known cause of sudden death due to acute obstructive hydrocephalus. 6 , 13 , 18 , 21 , 26 In general, colloid cysts expand due to secretion of an amorphous and protein-rich fluid resulting in obstruction of CSF flow at the foramen of Monro. Although hemorrhage within the cyst can lead to cyst expansion, this condition is extremely rare. To the best of the authors' knowledge, there have been only 9 cases of hemorrhagic colloid cysts reported in the English literature. 3 , 5 , 7 , 8 , 10

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Tohru Terao, Hiroshi Takahashi, Fusako Yokochi, Makoto Taniguchi, Ryouichi Okiyama, and Ikuma Hamada

S tereotactic surgery for movement disorders has recently undergone a resurgence of interest. 2, 8, 12, 28, 36, 43, 44 At many centers MER is now used to enhance the precision of stereotactic procedures. 23 Whether the beneficial information received by recording microelectrode passes outweighs the risk of tissue damage, however, remains controversial. 19 Of particular concern is the induction of intracranial hemorrhage by microelectrode penetration. 26 Hematomas occasionally induce clinical symptoms such as changes in consciousness, hemiparesis, or visual