101
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Borghero Y, Guerrero T, Noyola-Martinez J, Cox J, Stevens C, Liao Z, Jeter M, Chang J, Sanders K, Komaki R. Interobserver Variability in Non-Small Cell Lung Cancer Target Delineation Among Thoracic Radiation Oncologists. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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102
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Hunjan S, Rosen I, Peter B, Prado K, Luo D, Starkschall G, Liu H, Stevens C, Mohan R. Characterization of Breathing Patterns of Patients undergoing Respiratory-Correlated Imaging. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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103
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Yom S, Liao Z, Liu H, Allen P, Chang J, Jeter M, Guerrero T, Stevens C, Cox J, Komaki R. O-152 Analysis of acute toxicity results of intensity modulated radiationtherapy (IMRT) in the treatment of non-small cell lung cancer (NSCLC). Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80286-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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104
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Stevens C, Rice D, Forster K, Zhu X, Smythe W. O-081 IMRT after extrapleural pneumonectomy prevents local recurrence of mesothelioma. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80214-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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105
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Altundag O, Stewart D, Stevens C, Rice D, Ayers G, Blumenschein G, Karp D, Hong W, Fossella F, Zinner R. P-444 Some patients (pts) with “Wet” IIIB non-small cell lung cancer (NSCLC) may not develop distant metastases: A retrospective study. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80937-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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106
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Stevens C, Rice D, Forster K, Liao Z, Guerrero T, Correa A, Vaporciyan A, Smythe WR. Extrapleural pneumonectomy followed by IMRT: Results of a phase I/II study. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.7178] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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107
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Altundag O, Stewart DJ, Stevens C, Rice DC, Ayers GD, Blumenschein GR, Karp DD, Hong WK, Fossella FV, Zinner RG. The risk of distant metastases in patients with non-small cell lung cancer (NSCLC) with cytologically proven malignant pleural effusion, stage IIIB: A retrospective analysis. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.9568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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108
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Komaki R, Allen P, Glisson B, Lu C, Fossella F, Liao Z, Jeter M, Stevens C, Chang J, Guerrero T, Blumenschein G. Hyperfractionated/accelerated thoracic radiation therapy (HFXRT) increased survival compared to daily RT (QDRT) for limited small cell lung cancer (LSCLC) with Concurrent Chemotherapy (ChT). J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.7158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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109
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Starkschall G, Fitzpatrick M, Balter P, Stevens C, Mohan R. SU-FF-J-14: Determination of Displacement Binning Points for Four-Dimensional CT Image Acquisition. Med Phys 2005. [DOI: 10.1118/1.1997560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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110
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Klein E, Stevens C. TU-B-T-6B-01: Transition to Heterogeneity Corrections. Med Phys 2005. [DOI: 10.1118/1.1999703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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111
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Liu H, Wang X, Murshed H, Stevens C, Guerrero T, Balter P, Prado K, Liao Z, Chang J, Komaki R, Cox J, Mohan R. TU-E-T-6C-02: Clinical Implementation of IMRT for Lung Cancers. Med Phys 2005. [DOI: 10.1118/1.1999715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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112
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Bharucha AE, Fletcher JG, Harper CM, Hough D, Daube JR, Stevens C, Seide B, Riederer SJ, Zinsmeister AR. Relationship between symptoms and disordered continence mechanisms in women with idiopathic faecal incontinence. Gut 2005; 54:546-55. [PMID: 15753542 PMCID: PMC1774446 DOI: 10.1136/gut.2004.047696] [Citation(s) in RCA: 175] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Anal sphincter weakness and rectal sensory disturbances contribute to faecal incontinence (FI). Our aims were to investigate the relationship between symptoms, risk factors, and disordered anorectal and pelvic floor functions in FI. METHODS In 52 women with "idiopathic" FI and 21 age matched asymptomatic women, we assessed symptoms by standardised questionnaire, anal pressures by manometry, anal sphincter appearance by endoanal ultrasound and magnetic resonance imaging (MRI), pelvic floor motion by dynamic MRI, and rectal compliance and sensation by a barostat. RESULTS The prevalence of anal sphincter injury (by imaging), reduced anal resting pressure (35% of FI), and reduced squeeze pressures (73% of FI) was higher in FI compared with controls. Puborectalis atrophy (by MRI) was associated (p<0.05) with FI and with impaired anorectal motion during pelvic floor contraction. Volume and pressure thresholds for the desire to defecate were lower, indicating rectal hypersensitivity, in FI. The rectal volume at maximum tolerated pressure (that is, rectal capacity) was reduced in 25% of FI; this volume was associated with the symptom of urge FI (p<0.01) and rectal hypersensitivity (p = 0.02). A combination of predictors (age, body mass index, symptoms, obstetric history, and anal sphincter appearance) explained a substantial proportion of the interindividual variation in anal squeeze pressure (45%) and rectal capacity (35%). CONCLUSIONS Idiopathic FI in women is a multifactorial disorder resulting from one or more of the following: a disordered pelvic barrier (anal sphincters and puborectalis), or rectal capacity or sensation.
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113
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Ghoussayni S, Stevens C, Durham S, Ewins D. Assessment and validation of a simple automated method for the detection of gait events and intervals. Gait Posture 2004; 20:266-72. [PMID: 15531173 DOI: 10.1016/j.gaitpost.2003.10.001] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2003] [Revised: 09/23/2003] [Accepted: 10/08/2003] [Indexed: 02/02/2023]
Abstract
A simple and rapid automatic method for detection of gait events at the foot could speed up and possibly increase the repeatability of gait analysis and evaluations of treatments for pathological gaits. The aim of this study was to compare and validate a kinematic-based algorithm used in the detection of four gait events, heel contact, heel rise, toe contact and toe off. Force platform data is often used to obtain start and end of contact phases, but not usually heel rise and toe contact events. For this purpose synchronised kinematic, kinetic and video data were captured from 12 healthy adult subjects walking both barefoot and shod at slow and normal self-selected speeds. The data were used to determine the gait events using three methods: force, visual inspection and algorithm methods. Ninety percent of all timings given by the algorithm were within one frame (16.7 ms) when compared to visual inspection. There were no statistically significant differences between the visual and algorithm timings. For both heel and toe contact the differences between the three methods were within 1.5 frames, whereas for heel rise and toe off the differences between the force on one side and the visual and algorithm on the other were higher and more varied (up to 175 ms). In addition, the algorithm method provided the duration of three intervals, heel contact to toe contact, toe contact to heel rise and heel rise to toe off, which are not readily available from force platform data. The ability to automatically and reliably detect the timings of these four gait events and three intervals using kinematic data alone is an asset to clinical gait analysis.
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114
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Thwaites R, Spanu PD, Panopoulos NJ, Stevens C, Mansfield JW. Transcriptional regulation of components of the type III secretion system and effectors in Pseudomonas syringae pv. phaseolicola. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2004; 17:1250-1258. [PMID: 15553250 DOI: 10.1094/mpmi.2004.17.11.1250] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Quantitative real-time polymerase chain reaction was used with specific TaqMan probes to examine transcription of selected hrp and effector genes in Pseudomonas syringae pv. phaseolicola strains 1448A (race 6) and 1449B (race 7). Transcripts examined were from genes encoding the regulators hrpR and hrpL, core structural components of the type III secretion system (TTSS) hrcC, hrcJ, hrcN, hrcU, and hrpA; the first open-reading frame of each hrp operon, including hrpF, hrpJ, hrpP, and hrpY, and also secreted effectors hrpZ, avrPphE, avrPphF, and virPphA. All genes were induced by incubation in a minimal medium and showed patterns of expression indicating regulation by HrpRS and HrpL. Basal mRNA levels and the timing of accumulation of transcripts after induction differed significantly, suggesting the operation of additional regulatory elements. However, no clear transcriptional hierarchy emerged to explain the ordered construction of the TTSS. Quantitative analysis confirmed that the rates and levels of transcript accumulation within the first 2 h after inoculation were considerably higher in planta than in vitro, and indicated that plant cell wall contact may enhance transcription of TTSS and effector genes in P. syringae pv. phaseolicola. The low-abundance hrcU mRNA had a half-life of 16.5 min, whereas other transcripts had half-lives between 3 and 8 min.
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115
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Komaki R, Allen P, Glisson B, Milas L, Charles L, Kaplan B, Fossella F, Liao Z, Jeter M, Stevens C, Chang J, Guerrero T. Hyperfractionated and accelerated thoracic radiation therapy (HFXATRT) increased survival compared to daily TRT (QDTRT) for limited small cell lung cancer (LSCLC) patients treated with concurrent chemotherapy. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.06.149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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116
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Sanders K, Guerrero T, Zhang G, Bilton S, Stevens C, Lu C, Stewart D, Komaki R. Quantitative measurement of regional tumor response to therapy. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.06.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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117
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Durham S, Eve L, Stevens C, Ewins D. Effect of Functional Electrical Stimulation on asymmetries in gait of children with hemiplegic cerebral palsy. Physiotherapy 2004. [DOI: 10.1016/j.physio.2004.02.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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118
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Chandra A, Liu H, Tucker S, Liao Z, Stevens C, Chang J, Jeter M, O’Reilly M, Mohan R, Cox J, Komaki R, Guerrero T. IMRT reduces lung irradiation in distal esophageal cancer over 3D CRT. Int J Radiat Oncol Biol Phys 2003. [DOI: 10.1016/s0360-3016(03)01307-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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119
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Taylor NA, Liao ZX, Stevens C, Walsh G, Roth J, Putnam J, Fossella F, Allen P, Cox JD, Komaki R. Postoperative radiotherapy increases locoregional control of patients with stage IIIA non-small-cell lung cancer treated with induction chemotherapy followed by surgery. Int J Radiat Oncol Biol Phys 2003; 56:616-25. [PMID: 12788166 DOI: 10.1016/s0360-3016(03)00063-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To determine the effectiveness of postoperative radiotherapy (RT) in patients with Stage IIB and Stage IIIA non-small-cell lung cancer (NSCLC) treated with induction chemotherapy followed by surgery. METHODS AND MATERIALS We retrospectively reviewed the treatment records of 98 patients (58 men and 40 women; median age 61 years, range 31-91) with Stage IIB and Stage IIIA NSCLC who were treated with induction chemotherapy followed by surgery at our institution between January 1990 and December 2000. Patients were grouped by treatment (chemotherapy/surgery alone vs. chemotherapy/surgery/RT), by disease stage and nodal classification. The rates of local control (LC), disease-specific survival, disease-free survival, and overall survival (OS) were calculated using the Kaplan-Meier method. RESULTS Of the 98 patients, 40 had Stage IIB and 58 had Stage IIIA. The clinical disease stage and N stage were significantly greater in those patients who underwent RT than in those who did not; however, no statistically significant differences were identified in the additional characteristics between those receiving and not receiving RT within each stage or nodal group. The overall 5-year actuarial LC rate was 81% in the RT group and 54% in the chemotherapy/surgery-alone group (p = 0.07). Postoperative RT significantly improved the 5-year LC rate in patients with Stage IIIA disease (from 35% to 82%, p = 0.01). Postoperative RT did not significantly improve the 5-year OS rate (30% with RT vs. 49% without) for all patients or for patients with Stage IIIA disease. The disease-specific survival and disease-free survival rates did not differ between the treatment groups. Patients who responded to induction chemotherapy had a significantly greater 5-year OS rate (49%) than did those with stable or progressive disease (22%, p = 0.003). CONCLUSION Postoperative RT in patients with Stage IIIA NSCLC treated with induction chemotherapy followed by surgery significantly improved LC without improving OS. Significantly improved survival was observed in all patients who responded to induction chemotherapy compared with those with stable or progressive disease.
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MESH Headings
- Adenocarcinoma/mortality
- Adenocarcinoma/pathology
- Adenocarcinoma/radiotherapy
- Adult
- Aged
- Aged, 80 and over
- Carcinoma, Large Cell/mortality
- Carcinoma, Large Cell/pathology
- Carcinoma, Large Cell/radiotherapy
- Carcinoma, Non-Small-Cell Lung/mortality
- Carcinoma, Non-Small-Cell Lung/pathology
- Carcinoma, Non-Small-Cell Lung/radiotherapy
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/pathology
- Carcinoma, Squamous Cell/radiotherapy
- Chemotherapy, Adjuvant
- Combined Modality Therapy
- Disease-Free Survival
- Female
- Humans
- Lung Neoplasms/mortality
- Lung Neoplasms/pathology
- Lung Neoplasms/radiotherapy
- Male
- Middle Aged
- Neoplasm Staging
- Radiotherapy Dosage
- Remission Induction
- Retrospective Studies
- Survival Analysis
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120
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Wiltshire M, Hajnal J, Pendry J, Edwards D, Stevens C. Metamaterial endoscope for magnetic field transfer: near field imaging with magnetic wires. OPTICS EXPRESS 2003; 11:709-715. [PMID: 19461782 DOI: 10.1364/oe.11.000709] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report on the development and use of a highly anisotropic magnetic metamaterial for near-field imaging. The material consists of an array of Swiss Roll structures, resonant near 21.3 MHz, with a peak value of relative permeability ~35. At this peak, the material transfers an input magnetic field pattern to the output face without loss of intensity and with a spatial resolution equal to the roll diameter. It behaves as a near-field imaging device consisting of a bundle of magnetic wires.
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121
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Wagner JA, Flynn ME, Knops A, Hartford AH, Dallob AL, Tanaka WK, DeSmet M, Van Dyck K, Stevens C, Scherer PE, Gottesdiener KM. PPAR gamma activation rapidly increases ACRP30 in non-diabetic subjects. Clin Pharmacol Ther 2003. [DOI: 10.1016/s0009-9236(03)90633-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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122
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Mason JC, De Michele A, Stevens C, Ruth RA, Hashisaki GT. Cochlear implantation in patients with auditory neuropathy of varied etiologies. Laryngoscope 2003; 113:45-9. [PMID: 12514381 DOI: 10.1097/00005537-200301000-00009] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES/HYPOTHESIS Auditory neuropathy is a relatively recently described pattern of hearing loss characterized by preservation of outer hair cell function despite absent brainstem auditory evoked responses. Intact outer hair cell function is demonstrated by the presence of otoacoustic emissions and/or a measurable cochlear microphonic on electrocochleography, whereas no synchronous neural activity (absent action potentials) is seen on acoustically evoked brainstem auditory evoked response testing. The study reviews the authors' experience with six patients diagnosed with auditory neuropathy, four of whom have undergone cochlear implantation. MATERIALS AND METHODS A retrospective review of all medical and audiological charts at the University of Virginia Hospitals (Charlottesville, VA) was performed to identify patients who have undergone cochlear implantation or have been diagnosed with auditory neuropathy, or both. RESULTS Six patients with hearing loss attributable to auditory neuropathy were identified, four of whom have undergone cochlear implantation. Causes varied, including congenital, infectious, and idiopathic origins. Adults demonstrated subjective auditory perception on promontory stimulation, whereas no repeatable brainstem auditory evoked response waveforms could be demonstrated on pediatric promontory stimulation testing. Patients with implants demonstrated implant-evoked brainstem auditory evoked responses and improved audiological performance. CONCLUSIONS The six cases presented in the study represent varied causes and, probably, varied sites of lesions of auditory neuropathy. Promontory stimulation has been valuable, particularly in adults. Cochlear implantation allows the opportunity to provide a supraphysiological electrical stimulation to the auditory nerve, with the hope of reintroducing synchronous neural activity. Greater confidence and enthusiasm for cochlear implantation in appropriately selected patients with auditory neuropathy are gained through experience with such diverse cases.
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123
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Okunieff P, Hammond E, Grignon D, Langer C, Pajak TF, Ang K, Bruner DW, Travis E, Greven K, Guha A, Moulder J, Pollack A, Scarantino C, Sneige N, Watson J, Amin M, Bondy M, Chakravarti A, Chapman JD, Dicker A, Harris J, Koch W, Komaki R, Lange C, McBride W, Mitchell J, Milas L, Movsas B, Pandya K, Pienta K, Regine W, Ritter M, Rubin P, Safran H, Sauter E, Schell M, Stevens C, Trotti A, Vikram B. Radiation Therapy Oncology Group. Research Plan 2002-2006. Translational Research Program. Int J Radiat Oncol Biol Phys 2002; 51:75-87. [PMID: 11641020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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124
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Newton HB, Stevens C, Santi M. Brain metastases from fallopian tube carcinoma responsive to intra-arterial carboplatin and intravenous etoposide: a case report. J Neurooncol 2001; 55:179-84. [PMID: 11859973 DOI: 10.1023/a:1013811612546] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Fallopian tube carcinoma is the least common neoplasm of the female genital tract. Although rare, neurological complications such as brain metastases can develop. It remains unclear, however, what role chemotherapy has in the treatment of these patients and what route of administration is most effective. Intra-arterial (IA) regional administration of chemotherapy may increase intra-tumoral drug concentrations and improve efficacy. We report the case of a 47-year-old woman who developed bilateral fallopian tube cancer and multifocal brain metastases. After progression through radiation therapy and oral chemotherapy, she was placed on IA carboplatin (200 mg/m2/d x 2 days every 4 weeks) and intravenous etoposide (100 mg/m2/d x 2 days every 4 weeks). During treatment she had objective tumor shrinkage that has remained stable for more than 12 months. For patients with fallopian tube carcinoma that develop brain metastases and respond poorly to surgery and/or irradiation, multi-agent chemotherapy containing carboplatin should be considered. The effectiveness of carboplatin may be improved if administered by the IA route.
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125
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Ahamad A, Forster K, Smythe W, Liao Z, Kelly J, Komaki R, Stevens C. Adjuvant IMRT for malignant mesothelioma. Int J Radiat Oncol Biol Phys 2001. [DOI: 10.1016/s0360-3016(01)02555-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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