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Hagstrom R, Nossek E, Rutledge CW, Ponchione E, Suryadevara C, Kremer C, Alcon A, Sharashidze V, Shapiro M, Raz E, Nelson PK, Staffenberg DA, Riina HA. Transpalpebral/Blepharoplasty Incision and Supraorbital Craniotomy for the Treatment of Ethmoidal Dural Arteriovenous Fistulas: A Case Series. Oper Neurosurg (Hagerstown) 2024:01787389-990000000-01066. [PMID: 38376155 DOI: 10.1227/ons.0000000000001103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 01/03/2024] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Inherent complex angioarchitecture associated with ethmoidal dural arteriovenous fistulas (dAVFs) can make endovascular treatment methods challenging. Many surgical approaches are accompanied by unfavorable cosmetic results such as facial scarring. Blepharoplasty incision of the eyelid offers a minimal, well-hidden scar compared with other incision sites while offering the surgeon optimal visualization of pathogenic structures. This case series aims to report an initial assessment of the safety and efficacy of supraorbital craniotomy by blepharoplasty transpalpebral (eyelid) incision for surgical disconnection of ethmoidal dAVFs. METHODS Retrospective chart review was conducted for all patients who underwent blepharoplasty incision and craniotomy for disconnection of ethmoidal dAVFs at our institution between October 2011 and February 2023. Patient charts and follow-up imaging were reviewed to report clinical and angiographic outcomes as well as periprocedural and follow-up complications. RESULTS Complete obliteration and disconnection of ethmoidal dAVF was achieved in all 6 (100%) patients as confirmed by intraoperative angiogram with no resulting morbidity or mortality. Periprocedural complications included one case of transient nasal cerebrospinal fluid leak that was self-limiting and resolved before discharge without intervention. CONCLUSION Surgical treatment for ethmoidal dAVFs, specifically by transpalpebral incision and supraorbital craniotomy, is a safe and effective treatment option and affords the surgeon greater access to the floor of the anterior fossa when necessary. In addition, blepharoplasty incision addressed patient concerns for facial scarring compared with other incision sites by creating a more well-hidden, minimal scar in the natural folds of the eyelid for patients with an eyelid crease.
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Affiliation(s)
- Rory Hagstrom
- Department of Neurosurgery, NYU Langone Health, New York, New York, USA
| | - Erez Nossek
- Department of Neurosurgery, NYU Langone Health, New York, New York, USA
| | - Caleb W Rutledge
- Department of Neurosurgery, NYU Langone Health, New York, New York, USA
| | | | | | - Caroline Kremer
- Department of Neurosurgery, NYU Langone Health, New York, New York, USA
| | - Andre Alcon
- Hansjörg Wyss Department of Plastic Surgery, NYU Langone Health, New York, New York, USA
| | - Vera Sharashidze
- Department of Neurology, NYU Langone Health, New York, New York, USA
| | - Maksim Shapiro
- Department of Radiology, NYU Langone Health, New York, New York, USA
| | - Eytan Raz
- Department of Radiology, NYU Langone Health, New York, New York, USA
| | - Peter K Nelson
- Department of Radiology, NYU Langone Health, New York, New York, USA
| | - David A Staffenberg
- Hansjörg Wyss Department of Plastic Surgery, NYU Langone Health, New York, New York, USA
| | - Howard A Riina
- Department of Neurosurgery, NYU Langone Health, New York, New York, USA
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Olsen GJ, Matsuda H, Hagstrom R, Overbeek R. fastDNAmL: a tool for construction of phylogenetic trees of DNA sequences using maximum likelihood. Comput Appl Biosci 1994; 10:41-8. [PMID: 8193955 DOI: 10.1093/bioinformatics/10.1.41] [Citation(s) in RCA: 260] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We have developed a new tool, called fastDNAml, for constructing phylogenetic trees from DNA sequences. The program can be run on a wide variety of computers ranging from Unix workstations to massively parallel systems, and is available from the Ribosomal Database Project (RDP) by anonymous FTP. Our program uses a maximum likelihood approach and is based on version 3.3 of Felsenstein's dnaml program. Several enhancements, including algorithmic changes, significantly improve performance and reduce memory usage, making it feasible to construct even very large trees. Trees containing 40-100 taxa have been easily generated, and phylogenetic estimates are possible even when hundreds of sequences exist. We are currently using the tool to construct a phylogenetic tree based on 473 small subunit rRNA sequences from prokaryotes.
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Affiliation(s)
- G J Olsen
- Department of Microbiology, University of Illinois, Urbana 61801
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Klapper I, Hagstrom R, Fine R, Sharp K, Honig B. Focusing of electric fields in the active site of Cu-Zn superoxide dismutase: effects of ionic strength and amino-acid modification. Proteins 1986; 1:47-59. [PMID: 3449851 DOI: 10.1002/prot.340010109] [Citation(s) in RCA: 665] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In this paper we report the implementation of a finite-difference algorithm which solves the linearized Poisson-Boltzmann equation for molecules of arbitrary shape and charge distribution and which includes the screening effects of electrolytes. The microcoding of the algorithm on an ST-100 array processor allows us to obtain electrostatic potential maps in and around a protein, including the effects of ionic strength, in about 30 minutes. We have applied the algorithm to a dimer of the protein Cu-Zn superoxide dismutase (SOD) and compared our results to those obtained from uniform dielectric models based on coulombic potentials. We find that both the shape of the protein-solvent boundary and the ionic strength of the solvent have a profound effect on the potentials in the solvent. For the case of SOD, the cluster of positive charge at the bottom of the active site channel produces a strongly enhanced positive potential due to the focusing of field lines in the channel-a result that cannot be obtained with any uniform dielectric model. The remainder of the protein is surrounded by a weak negative potential. The electrostatic potential of the enzyme seems designed to provide a large cross-sectional area for productive collisions. Based on the ionic strength dependence of the size of the positive potential region emanating from the active site and the repulsive negative potential barrier surrounding the protein, we are able to suggest an explanation for the ionic strength dependence of the activity of the native and chemically modified forms of the enzyme.
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Affiliation(s)
- I Klapper
- High Energy Physics Division, Argonne National Laboratory, Illinois 60439
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