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Featured researches published by Carl J. Graf.


Neurosurgery | 1981

Overall management of ruptured aneurysm: comparison of early and late operation.

Neal F. Kassell; David J. Boarini; Harold P. Adams; A. L. Sahs; Carl J. Graf; James C. Torner; Mary K. Gerk

The overall management results with 61 consecutive patients admitted within 3 days of subarachnoid hemorrhage from a ruptured intracranial aneurysm were analyzed. During the course of this study, the preferred method of management shifted from late surgery (planned at least 7 days after the last hemorrhage) to early surgery (within 4 days of the last hemorrhage). Ten moribund patients were excluded from analysis, leaving 24 in the late group and 27 in the early group. Both groups had comparable patient demographic characteristics and neurological conditions, and their care was supervised by one neurosurgeon (N.F.K.). A microsurgical intracranial operation was performed on all patients who survived long enough to have surgery. The intraoperative conditions and complications were similar for the two groups. The average length of follow-up was 11 months in the late and 9 months in the early group. The overall management results for the late group showed a 42% favorable outcome, a 17% unfavorable outcome, and a 42% mortality. The early group had an 81% favorable outcome, a 7% unfavorable outcome, and an 11% mortality. Patients in both good and poor conditions fared better in the early group. Seven late group patients rebled, compared to none in the early group. The number of medical complications, the length of hospitalization, and the occurrence of symptomatic vasospasm were all greater in the late group. Vasospasm in the early group occurred only postoperatively and, with the aneurysms secured, was treated more aggressively and successfully with hypertensive/hypervolemic therapy than the predominantly operative vasospasm in the late group.


Neuroradiology | 1979

The complementary nature of computed tomography and angiography in the diagnosis of cerebellar hemangioblastoma.

Steven H. Cornell; Nadi S. Hibri; Arnold H. Menezes; Carl J. Graf

SummaryCerebellar hemangioblastomas were seen in seven persons, five being members of the same family. All were studied with constrast enhanced CT scans and vertebral angiograms. The CT scans were superior for demonstrating the cystic component of the tumors and associated hydrocephalus, features not usually evident on the angiograms. The angiograms were superior for revealing the vascular nature, supply and drainage of the tumors. In several patients the angiograms revealed more tumors than could be seen by CT. Both CT and angiography contribute important information in the diagnosis of these neoplasms.


Pediatric Neurosurgery | 1980

Abnormalities of the Cranio-Vertebral Junction with Cervico-Medullary Compression

Arnold H. Menezes; Carl J. Graf; Nadi S. Hibri

8 children with cranio-vertebral abnormalities and neurological deficits are reviewed. The specific treatment is dependent on etiology, mechanisms of compression, and whether the bony abnormality can be reduced to its normal position. Irreducible ventral compression of the cervico-medullary junction was relieved by transoral removal of the odontoid-clivus complex in 3 patients. Primary posterior decompression was done in 4 children with dorsal encroachment. A reducible C1-C2 dislocation in 1 child with juvenile rheumatoid arthritis underwent primary posterior fusion. A detailed surgical physiological approach is described.


Neurosurgery | 1983

Management and outcome of pineal region tumors.

Patrick W. Hitchon; Monzer M. Abu-Yousef; Carl J. Graf; Donn M. Turner; John C. VanGilder

The management and outcome of 45 patients with tumors in the pineal region are reviewed. The overall male to female ratio was 2:1, and over one-half of the patients presented during the 2nd decade of life. Sixteen of the 21 survivors are presently gainfully employed and suffer only minor deficits. Two of 3 survivors in whom the lesion was biopsied harbored germinomas, while the third had an epidermoid. Among the 18 nonsurvivors, all of whom died of their tumors, 15 succumbed within 2 1/2 years of hospital admission. Twelve of the 13 nonsurvivors in whom histological confirmation was obtained by operation or autopsy had malignant tumors. Computed axial tomography was helpful in making the diagnosis of tumor type in 7 of the 11 cases with confirmed pathology. Cerebrospinal fluid cytology disclosed malignant cells in 4 of 11 patients with proven pineal malignancy. Irradiation and shunting were performed in nearly all survivors and in a little over one-half of the nonsurvivors. Where noninvasive studies are equivocal for malignancy, biopsy may be indicated.


Journal of Neurosurgery | 1980

Spontaneous recurrent hemorrhage as an unusual complication of fibrous dysplasia of the skull. Case report.

Carl J. Graf; George E. Perret

✓ The case of a patient with fibrous dysplasia of the skull associated with recurrent spontaneous hemorrhage is presented. Suggestions for management of this unusual complication are made.


Journal of Neurosurgery | 1983

Bleeding from cerebral arteriovenous malformations as part of their natural history

Carl J. Graf; George Perret; James C. Torner


Journal of Neurosurgery | 1980

Craniocervical abnormalities: A comprehensive surgical approach

Arnold H. Menezes; John C. VanGilder; Carl J. Graf; Dennis E. McDonnell


JAMA Neurology | 1984

Cooperative Study of Intracranial Aneurysms and Subarachnoid Hemorrhage: A Long-term Prognostic Study: III. Subarachnoid Hemorrhage of Undetermined Etiology

Hiro Nishioka; James C. Torner; Carl J. Graf; Neal F. Kassell; A. L. Sahs; Linda C. Goettler


Journal of Neurosurgery | 1978

Catecholamine response to intracranial hypertension

Carl J. Graf; Nicholas P. Rossi


JAMA Neurology | 1984

Cooperative Study of Intracranial Aneurysms and Subarachnoid Hemorrhage: A Long-term Prognostic Study: II. Ruptured Intracranial Aneurysms Managed Conservatively

Hiro Nishioka; James C. Torner; Carl J. Graf; Neal F. Kassell; A. L. Sahs; Linda C. Goettler

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Arnold H. Menezes

University of Iowa Hospitals and Clinics

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Nadi S. Hibri

University of Iowa Hospitals and Clinics

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Steven H. Cornell

University of Iowa Hospitals and Clinics

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John C. VanGilder

University of Iowa Hospitals and Clinics

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Charles G. Jacoby

University of Iowa Hospitals and Clinics

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