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Jens R. Chapman, Paul A. Anderson, Christopher Pepin, Sean Toomey, David W. Newell, and M. Sean Grady

and dislocations. These techniques involve the use of wires or plates and screws applied anteriorly or posteriorly and have achieved excellent results with low morbidity. 1, 3, 4, 6, 8, 12, 16, 21, 29, 31 The purpose of this study is to report the use of AO reconstruction plates at the cervicothoracic junction in 23 patients. Specifically, we examined the areas of neurological deficit, spine stability, maintenance of alignment, and complications after using this internal fixation technique. Clinical Material and Methods Patient Population This study was

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Nosrat O. Ameli, Kazem Abbassioun, Hossein Saleh, and Ahmad Eslamdoost

stroma consists of a brownish fibro-osseous meshwork with a few giant cells, extravasated blood, hemosiderin-laden phagocytes, and fields of osteoid and new bone formation. 16 Aneurysmal bone cysts comprise 1.4% of all bone tumors. 12 They can occur in any part of the skeleton, and about 20% of cases involve the spine. 12 They primarily affect young people: 80% to 90% of the cases have occurred in individuals below the age of 20 years. 22 Both sexes are equally afflicted. The lesion usually grows rapidly, with the duration of symptoms averaging 4 months. There may

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Matthew T. Mayr, Stephen Hunter, Scott C. Erwood, and Regis W. Haid Jr

C alcifying pseudoneoplasms are rare, with only a few descriptions in the literature. Bertoni, et al., 1 described 14 cases treated at the Mayo Clinic over a period of 36 years, including eight cases involving the spine. The patients in these cases presented with pain in the affected area. In the current report we describe two patients with calcifying pseudoneoplasms, one located in the thoracic spine and the other in the cervical spine, both of which caused myelopathic symptoms, including weakness and spastic gait. Case Reports Case 1 This 58-year

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Greg James, Matthew Crocker, Andrew King, Istvan Bodi, Ahmed Ibrahim, and Bhupal P. Chitnavis

within the mass of the tumor. 10 Malignant triton tumors have been described in a wide variety of anatomical sites, including the head and neck, and the trunk and upper and lower limbs. 13 Malignant triton tumors arising in and around the spine pose special difficulties in diagnosis and management, and MTTs of the spine, trunk, and buttocks have a poorer prognosis than those in the head, neck, and extremities, 13 possibly due to the particular difficulties encountered in radical resection. Previous reports have noted that total macroscopic excision is more

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Julie E. York, Rasim H. Berk, Gregory N. Fuller, Jasti S. Rao, Dima Abi-Said, David M. Wildrick, and Ziya L. Gokaslan

P rimary chondrosarcoma of the spine is an extremely rare tumor, and only 21 patients with this condition have been treated at The University of Texas M. D. Anderson Cancer Center as of 1997. In such patients, the roles of various treatment options, namely surgical excision, radiation therapy, and chemotherapy, have not been well established. Although surgical excision has been advocated as the primary mode of therapy for treating patients with chondrosarcoma, the role of an aggressive surgical approach has not been well documented. The purpose of this study

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Caterina Giannini, Bernd W. Scheithauer, Doris E. Wenger, and Krishnan K. Unni

spine have been reported in the literature, mostly as single case reports that included limited follow-up data. 3, 5, 10–14, 17, 18 Therefore, information regarding the natural history, treatment, and prognosis of PVNS remains limited. To characterize this lesion, particularly with regard to its aggressive potential, therapy, and prognosis, we reviewed our own experience with cases of PVNS of the spine and obtained extended follow-up data from several of the cases previously reported. As a result, the present study represents a clinicopathological summary of 22

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Jordan I. Gewirtz, Alex Skidmore, Matthew D. Smyth, David D. Limbrick Jr., Manu Goyal, Joshua S. Shimony, Robert C. McKinstry, Mari L. Groves, and Jennifer M. Strahle

T raditional spine MRI protocols require the patient to remain still during the examination, frequently resulting in the need for sedation in young children. The immediate and long-term risk of anesthesia in the pediatric population is controversial. Studies suggesting the possibility of negative neurocognitive outcomes with prenatal or pediatric exposure to general anesthesia have led the US FDA to issue updated warnings and require label changes on general anesthesia and sedation medications regarding the dangers of repeated use in pregnant women and children

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Jordan I. Gewirtz, Alex Skidmore, Matthew D. Smyth, David D. Limbrick Jr., Manu Goyal, Joshua S. Shimony, Robert C. McKinstry, Mari L. Groves, and Jennifer M. Strahle

T raditional spine MRI protocols require the patient to remain still during the examination, frequently resulting in the need for sedation in young children. The immediate and long-term risk of anesthesia in the pediatric population is controversial. Studies suggesting the possibility of negative neurocognitive outcomes with prenatal or pediatric exposure to general anesthesia have led the US FDA to issue updated warnings and require label changes on general anesthesia and sedation medications regarding the dangers of repeated use in pregnant women and children

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Daniel M. Sciubba, Rory J. Petteys, Mark B. Dekutoski, Charles G. Fisher, Michael G. Fehlings, Stephen L. Ondra, Laurence D. Rhines, and Ziya L. Gokaslan

are slightly more prone to the development of spinal metastases, probably reflecting the slightly higher prevalence of lung cancer in men, and of prostate cancer over breast cancer. 107 This disparity may vanish, however, as adjuvant therapies for breast cancer increase the overall survival of patients with this disease, thus increasing the period during which lesions in the spine may arise. Spinal metastases are most likely to originate from breast, lung, or prostate tumors, reflecting the high prevalence of these tumors and their tendency to metastasize to bone

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Michael A. Galgano, Carlos R. Goulart, Hans Iwenofu, Lawrence S. Chin, William Lavelle, and Ehud Mendel

O steoblastomas are primary bone neoplasms with a predilection for the spine. Histologically, they are generally indistinguishable from their smaller counterparts, osteoid osteomas. 11 , 70 Osteoblastomas are generally greater than 2 cm in diameter, whereas osteoid osteomas are 1.5 cm or less. 11 Osteoblastomas tend to predominate in the pediatric population during the 2nd decade of life. 11 They were first described by Lichtenstein in the 1950s as “osteogenic fibromas of bone.” 53 In the following decade, numerous accounts of this primary bone tumor