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Sagar P, Srivastava M, Tiwari RK, Kumar A, Srivastava A, Pandey G, Srivastava S. In-situ One-pot Novel Synthesis of Molybdenum di-Telluride@Carbon Nano-Dots for Sensitive and Selective Detection of Hydrogen Peroxide Molecules via Turn-off Fluorescence Mechanism. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sagar P, Srivastava M, Srivastava SK. Electrochemical Sensor for the Anti‐tuberculosis Drug Rifampicin on CuO@rGO‐Nanocomposite‐Modified GCE by Voltammetry Techniques. ChemistrySelect 2022. [DOI: 10.1002/slct.202202271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pinky Sagar
- Department of Physics Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Monika Srivastava
- School of Materials Science & Technology Indian Institute of Technology (BHU) Varanasi 221005 India
| | - Sanjay K. Srivastava
- Department of Physics Institute of Science Banaras Hindu University Varanasi 221005 India
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Javed MA, Kohler A, Tiernan J, Quyn A, Sagar P. Evaluating potential delays and outcomes of patients undergoing surgical resection for locally advanced and recurrent colorectal cancer during a pandemic. Ann R Coll Surg Engl 2022; 104:624-631. [PMID: 35132892 PMCID: PMC9433197 DOI: 10.1308/rcsann.2021.0274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/13/2021] [Indexed: 09/03/2023] Open
Abstract
INTRODUCTION The COVID-19 pandemic resulted in a significant disruption of colorectal cancer (CRC) care pathways. This study evaluates the management and outcomes of patients with primary locally advanced or recurrent CRC during the pandemic in a single tertiary referral centre. METHODS Patients undergoing elective surgery for advanced or recurrent CRC with curative intent between March 2020 and March 2021 were identified. Following first multidisciplinary team discussion patients were broadly classified into two groups: straight to surgery (n=22, 45%) or neoadjuvant therapy followed by surgery (n=27, 55%). Primary outcome was COVID-19-related complication rate. RESULTS Forty-nine patients with a median age of 66 years (interquartile range: 54-73) were included. No patients developed a COVID-19 infection or related complication during hospital admission. Significant delays were identified in the treatment pathway of patients in the straight to surgery group, mostly due to delays in referral from external centres. Nine of 22 patients in the straight to surgery group had evidence of tumour progression compared with 3 of 27 in the neoadjuvant group (p=0.015839). Seven of 27 patients in the neoadjuvant group showed evidence of tumour regression. During the study, surgical waiting times were reduced, and more operations were performed during the second wave of COVID-19. CONCLUSION This study suggests that it is possible to mitigate the risks of COVID-19-related complications in patients undergoing complex surgery for locally advanced and recurrent CRC. Delay in surgical intervention is associated with tumour progression, particularly in patients who may not have neoadjuvant therapy. Efforts should be made to prioritise resources for patients requiring time-sensitive surgery for advanced and recurrent CRC.
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Sagar P, Yogesh K, Syed A, Marraiki N, Elgorban AM, Zaghloul NSS, Ashoka S. Studies on the effect of crystalline Fe2O3 on OER performance of amorphous NiOOH electrodeposited on stainless steel substrate. Chem Pap 2022. [DOI: 10.1007/s11696-022-02382-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sagar P, Gupta GK, Srivastava M, Srivastava A, Srivastava SK. Tagetes erecta as an organic precursor: synthesis of highly fluorescent CQDs for the micromolar tracing of ferric ions in human blood serum. RSC Adv 2021; 11:19924-19934. [PMID: 35479259 PMCID: PMC9033680 DOI: 10.1039/d1ra01571k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 05/24/2021] [Indexed: 01/28/2023] Open
Abstract
The present article illustrates the green synthesis of novel carbon quantum dots (CQDs) from biomass viz. Tagetes erecta (TE), and subsequently fabrication of a metal ion probe for the sensing of Fe3+ in real samples. TE-derived CQDs (TE-CQDs) have been synthesized by a facile, eco-friendly, bottom-up hydrothermal approach using TE as a carbon source. The successful synthesis and proper phase formation of the envisaged material has been confirmed by various characterization techniques (Raman, XRD, XPS, TEM, and EDS). Notably, the green synthesized TE-CQDs show biocompatibility, good solubility in aqueous media, and non-toxicity. The as-synthesized TE-CQDs show an intense photoluminescence peak at 425 nm and exhibit excitation dependent photoluminescence behavior. The proposed TE-CQD-based probe offers a remarkable fluorescence (FL) quenching for Fe3+ with high selectivity (Kq ∼ 10.022 × 1013 M−1 s−1) and a sensitive/rapid response in a linear concentration range 0–90 μM (regression coefficient R2 ∼ 0.99) for the detection of Fe3+. The limit of detection (LOD) of the probe for Fe3+ has been found as 0.37 μM in the standard solution. It has further been applied for the detection of Fe3+ in real samples (human blood serum) and displays good performance with LOD ∼ 0.36 μM. The proposed TE-CQD-based ion sensing probe has potential prospects to be used effectively in biological studies and clinical diagnosis. TE-CQDs synthesized via the hydrothermal method for the detection of Fe3+ in HBS.![]()
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Affiliation(s)
- Pinky Sagar
- Department of Physics, Institute of Science, Banaras Hindu University Varanasi India 221005
| | - Gopal Krishna Gupta
- Department of Physics, TDPG College, VBS Purvanchal University Jaunpur India 222001
| | - Monika Srivastava
- School of Materials Science and Technology, IIT (BHU) Varanasi India 221005
| | - Amit Srivastava
- Department of Physics, TDPG College, VBS Purvanchal University Jaunpur India 222001
| | - S K Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University Varanasi India 221005
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Gupta GK, Sagar P, Pandey SK, Srivastava M, Singh AK, Singh J, Srivastava A, Srivastava SK, Srivastava A. In Situ Fabrication of Activated Carbon from a Bio-Waste Desmostachya bipinnata for the Improved Supercapacitor Performance. Nanoscale Res Lett 2021; 16:85. [PMID: 33987738 PMCID: PMC8119520 DOI: 10.1186/s11671-021-03545-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 05/05/2021] [Indexed: 06/01/2023]
Abstract
Herein, we demonstrate the fabrication of highly capacitive activated carbon (AC) using a bio-waste Kusha grass (Desmostachya bipinnata), by employing a chemical process followed by activation through KOH. The as-synthesized few-layered activated carbon has been confirmed through X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy techniques. The chemical environment of the as-prepared sample has been accessed through FTIR and UV-visible spectroscopy. The surface area and porosity of the as-synthesized material have been accessed through the Brunauer-Emmett-Teller method. All the electrochemical measurements have been performed through cyclic voltammetry and galvanometric charging/discharging (GCD) method, but primarily, we focus on GCD due to the accuracy of the technique. Moreover, the as-synthesized AC material shows a maximum specific capacitance as 218 F g-1 in the potential window ranging from - 0.35 to + 0.45 V. Also, the AC exhibits an excellent energy density of ~ 19.3 Wh kg-1 and power density of ~ 277.92 W kg-1, respectively, in the same operating potential window. It has also shown very good capacitance retention capability even after 5000th cycles. The fabricated supercapacitor shows a good energy density and power density, respectively, and good retention in capacitance at remarkably higher charging/discharging rates with excellent cycling stability. Henceforth, bio-waste Kusha grass-derived activated carbon (DP-AC) shows good promise and can be applied in supercapacitor applications due to its outstanding electrochemical properties. Herein, we envision that our results illustrate a simple and innovative approach to synthesize a bio-waste Kusha grass-derived activated carbon (DP-AC) as an emerging supercapacitor electrode material and widen its practical application in electrochemical energy storage fields.
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Affiliation(s)
- Gopal Krishna Gupta
- Department of Physics, TDPG College, VBS Purvanchal University, Jaunpur, 222001, India
| | - Pinky Sagar
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Sumit Kumar Pandey
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Monika Srivastava
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, 221005, India
| | - A K Singh
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Jai Singh
- Department of Pure and Applied Physics, Guru Ghasidas Vishwavidyalaya, Bilaspur, 495009, India
| | - Anchal Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - S K Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Amit Srivastava
- Department of Physics, TDPG College, VBS Purvanchal University, Jaunpur, 222001, India.
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Singh A, Sagar P, Kumar R, Kumar R. Letter to the Editor regarding "Dexamethasone eardrop with grommet placement vs intratympanic steroid injection for sudden sensorineural hearing loss: A randomized prospective clinical trial". Am J Otolaryngol 2021; 42:102785. [PMID: 33152575 DOI: 10.1016/j.amjoto.2020.102785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 08/13/2020] [Indexed: 11/25/2022]
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Akolkar D, Patil D, Fulmali P, Fulmali P, Patil R, Bendale K, Adhav A, Patel S, Khan S, Dasarathan R, Ranjan V, Chougule R, Shejwalkar P, Ainwale A, Garte M, Sonawane R, Purane M, Chaudhari Y, Sagar P, Nerkar S, Datta V, Sims C, Kumar P, Srinivasan A, Datar R. Analytical and clinical validation of the trucheckTM platform for diagnostic triaging of symptomatic cases suspected of prostate cancer. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)36226-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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9
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Sagar P, Devaraja K, Kumar R. Redefining the 'Handousa sign'. Br J Oral Maxillofac Surg 2020; 59:494-496. [PMID: 33077321 DOI: 10.1016/j.bjoms.2020.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 09/04/2020] [Indexed: 11/16/2022]
Affiliation(s)
- P Sagar
- Department of Otorhinolaryngology and Head and Neck Surgery, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - K Devaraja
- Department of Otorhinolaryngology and Head and Neck Surgery, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - R Kumar
- Department of Otorhinolaryngology and Head and Neck Surgery, All India Institute of Medical Sciences, New Delhi, 110029, India
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Burke JR, Brown P, Quyn A, Lambie H, Tolan D, Sagar P. Tumour growth rate of carcinoma of the colon and rectum: retrospective cohort study. BJS Open 2020; 4:1200-1207. [PMID: 32996713 PMCID: PMC8370463 DOI: 10.1002/bjs5.50355] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/18/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The growth pattern of colorectal cancer is seldom investigated. This cohort study aimed to explore tumour growth rate in colorectal cancers managed non-surgically or deemed not resectable, and to determine its implication for prognosis. METHODS Consecutive patients with colonic or rectal adenocarcinoma were identified through the colorectal multidisciplinary team database at Leeds Teaching Hospitals NHS Trust over a 2-year interval. Patients who received no treatment (surgery, stenting, colonic defunctioning procedures, chemotherapy, radiotherapy) and who underwent CT twice more than 5 weeks apart were included. Multidetector CT/three-dimensional image analysis was performed independently by three experienced radiologists. RESULTS Of 804 patients reviewed, 43 colorectal cancers were included in the final analysis. Median age at first CT was 80 (73-85) years and the median interval between scans was 150 (i.q.r. 72-471) days. An increase in T category was demonstrated in 31 of 43 tumours, with a median doubling time of 211 (112-404) days. The median percentage increase in tumour volume was 34·1 (13·3-53·9) per cent per 62 days. The all-cause 3-year mortality rate was 81 per cent (35 of 43) with a median survival time of 1·1 (0·4-2·2) years after the initial diagnostic scan. In those obstructed, the relative risk of death from subsequent perforation was 1·26 (95 per cent c.i. 1·07 to 1·49; P = 0·005). CONCLUSION This study documented a median doubling time of 211 days, with a concerning suggestion of tumour progression, which has implications for the current management standard.
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Affiliation(s)
- J. R. Burke
- John Golligher Colorectal Surgery UnitLeedsUK
- Leeds Institute of Biomedical and
Clinical SciencesSt James's University HospitalLeedsUK
| | - P. Brown
- Department of Clinical Radiology, Gastrointestinal and Abdominal Radiology,
St James's University Hospital, Leeds Teaching Hospitals NHS TrustLeedsUK
| | - A. Quyn
- John Golligher Colorectal Surgery UnitLeedsUK
- Leeds Institute of Biomedical and
Clinical SciencesSt James's University HospitalLeedsUK
| | - H. Lambie
- Department of Clinical Radiology, Gastrointestinal and Abdominal Radiology,
St James's University Hospital, Leeds Teaching Hospitals NHS TrustLeedsUK
| | - D. Tolan
- Department of Clinical Radiology, Gastrointestinal and Abdominal Radiology,
St James's University Hospital, Leeds Teaching Hospitals NHS TrustLeedsUK
| | - P. Sagar
- John Golligher Colorectal Surgery UnitLeedsUK
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Harji DP, Marshall H, Gordon K, Twiddy M, Pullan A, Meads D, Croft J, Burke D, Griffiths B, Verjee A, Sagar P, Stocken D, Brown J. Laparoscopic versus open colorectal surgery in the acute setting (LaCeS trial): a multicentre randomized feasibility trial. Br J Surg 2020; 107:1595-1604. [PMID: 32573782 DOI: 10.1002/bjs.11703] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/11/2020] [Accepted: 04/22/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Approximately 30 000 people undergo major emergency abdominal gastrointestinal surgery annually, and 36 per cent of these procedures (around 10 800) are carried out for emergency colorectal pathology. Some 14 per cent of all patients requiring emergency surgery have a laparoscopic procedure. The aims of the LaCeS (laparoscopic versus open colorectal surgery in the acute setting) feasibility trial were to assess the feasibility, safety and acceptability of performing a large-scale definitive phase III RCT, with a comparison of emergency laparoscopic versus open surgery for acute colorectal pathology. METHODS LaCeS was designed as a prospective, multicentre, single-blind, parallel-group, pragmatic feasibility RCT with an integrated qualitative study. Randomization was undertaken centrally, with patients randomized on a 1 : 1 basis between laparoscopic or open surgery. RESULTS A total of 64 patients were recruited across five centres. The overall mean steady-state recruitment rate was 1·2 patients per month per site. Baseline compliance for clinical and health-related quality-of-life data was 99·8 and 93·8 per cent respectively. The conversion rate from laparoscopic to open surgery was 39 (95 per cent c.i. 23 to 58) per cent. The 30-day postoperative complication rate was 27 (13 to 46) per cent in the laparoscopic arm and 42 (25 to 61) per cent in the open arm. CONCLUSION Laparoscopic emergency colorectal surgery may have an acceptable safety profile. Registration number: ISRCTN15681041 ( http://www.controlled-trials.com).
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Affiliation(s)
- D P Harji
- Department of Colorectal Surgery, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - H Marshall
- Clinical Trials Research Unit, Leeds, UK
| | - K Gordon
- Clinical Trials Research Unit, Leeds, UK
| | - M Twiddy
- Institute of Clinical and Applied Health Research, University of Hull, Hull, UK
| | - A Pullan
- Clinical Trials Research Unit, Leeds, UK
| | - D Meads
- Leeds Institute of Health Sciences, University of Leeds, Leeds, UK
| | - J Croft
- Clinical Trials Research Unit, Leeds, UK
| | - D Burke
- Department of Colorectal Surgery, St James's University Hospital, Leeds, UK
| | - B Griffiths
- Department of Colorectal Surgery, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - A Verjee
- Patient and Public Involvement Representative for LaCeS Trial, UK
| | - P Sagar
- Department of Colorectal Surgery, St James's University Hospital, Leeds, UK
| | - D Stocken
- Clinical Trials Research Unit, Leeds, UK
| | - J Brown
- Clinical Trials Research Unit, Leeds, UK
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Sagar P, Srivastava M, Prakash R, Srivastava SK. The fabrication of an MoS 2 QD-AuNP modified screen-printed electrode for the improved electrochemical detection of cefixime. Anal Methods 2020; 12:3014-3024. [PMID: 32930161 DOI: 10.1039/d0ay00899k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, we report a voltammetric method for the nanomolar detection of cefixime, a third-generation antibiotic. The determination of cefixime is validated on a glassy carbon electrode (GCE) as well as on a screen-printed carbon electrode (SPCE). In the present study, we have reported a facile "one step simple hydrothermal synthesis" of MoS2 quantum dots and with the oxidation of aurochloric acid for the further formation of an MoS2 QD-AuNP composite. The as-synthesized nanocomposite was characterized via UV-Vis spectroscopy, FTIR spectroscopy, XRD, TEM and EDX techniques, and further applied in the modification of working electrodes, showing excellent electroactivity. The sensing of cefixime was done via cyclic and differential pulse voltammetry techniques. The presence of the only anodic peak in the voltammogram reveals the irreversible oxidation of cefixime in the potential range of about 1.3 ± 0.1 V vs. Ag/AgCl. The study was also performed at different scan rates, which indicate a diffusion-controlled mechanism. The proposed cefixime sensor showed a linear response in the concentration range of 0.33-90.82 μM (at S/N = 3) with a limit of detection (LOD) of 3.9-4.5 nm. The electrochemical sensitivity is calculated as 8.63 μA μM-1 cm-2 and 7.07 μA μM-1 cm-2 in buffer and pharmaceutical formulation (commercially available cefixime tablet), respectively. The effects of several interferents were also investigated. The proposed sensor is effectively used for estimating cefixime in phosphate buffer and the commercially available cefixime tablets with no cross-reactivity or matrix effects and shows a promising prospect for real applications.
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Affiliation(s)
- Pinky Sagar
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Monika Srivastava
- School of Materials Science and Technology, IIT (BHU) Varanasi, 221005, India
| | - Rajiv Prakash
- School of Materials Science and Technology, IIT (BHU) Varanasi, 221005, India
| | - S K Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Jarrar A, Tiernan J, Helliwell J, Bandi B, Liska D, Seth R, Valente M, Sagar P, Steele S. Discussion on: Curative intent resection for loco-regionally recurrent colon cancer: Cleveland clinic experience. Am J Surg 2020; 219:424. [DOI: 10.1016/j.amjsurg.2020.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tabari A, Patino M, Westra SJ, Shailam R, Sagar P, Sahani DV, Nimkin K, Gee MS. Initial clinical experience with high-pitch dual-source CT as a rapid technique for thoraco-abdominal evaluation in awake infants and young children. Clin Radiol 2019; 74:977.e9-977.e15. [PMID: 31561835 DOI: 10.1016/j.crad.2019.08.021] [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: 02/08/2019] [Accepted: 08/23/2019] [Indexed: 10/26/2022]
Abstract
AIM To evaluate dual-source high-pitch computed tomography (HPCT) imaging of the chest and abdomen as a rapid scanning technique to obtain diagnostic-quality imaging evaluation of infants and young children without sedation. MATERIALS AND METHODS Fifty-three paediatric patients (age 24.1±2 months) who underwent chest or abdomen HPCT (≥1.5) and standard pitch CT (SPCT, <1.5) on a dual-source 128-row multidetector CT system were included in the study. Image quality assessment was performed by two paediatric radiologists for diagnostic confidence, image artefacts, and image noise. Objective image noise was measured. RESULTS Most of the CT examinations were performed in children who were >1 year old (n=15 and n=20) followed by ≤1 year old (n=8 and n=10) in SPCT and HPCT, respectively. The mean radiation dose (SSDE) from HPCT was 1.96±1 mGy compared to 2.2±1 mGy for SPCT (p=0.3). No major artefacts were reported and overall image quality of all HPCT examinations was acceptable diagnostically. In addition, objective image noise values were not significantly different between HPCT compared with SPCT (11±3 versus 11±5, p=0.7). CONCLUSION Ultra-fast, HPCT can be performed without the need for sedation as a potential alternative to anaesthetised magnetic resonance imaging in infants and young children.
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Affiliation(s)
- A Tabari
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA.
| | - M Patino
- Department of Radiology, Harvard Medical School, Boston, MA, USA; Division of Abdominal Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - S J Westra
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - R Shailam
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - P Sagar
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - D V Sahani
- Department of Radiology, Harvard Medical School, Boston, MA, USA; Division of Abdominal Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - K Nimkin
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - M S Gee
- Division of Pediatric Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA; Department of Radiology, Harvard Medical School, Boston, MA, USA
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Brown PJ, Hyland R, Quyn AJ, West NP, Sebag-Montefiore D, Jayne D, Sagar P, Tolan DJ. Current concepts in imaging for local staging of advanced rectal cancer. Clin Radiol 2019; 74:623-636. [PMID: 31036310 DOI: 10.1016/j.crad.2019.03.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/22/2019] [Indexed: 12/20/2022]
Abstract
Imaging of rectal cancer has an increasingly pivotal role in the diagnosis, staging, and treatment stratification of patients with the disease. This is particularly true for advanced rectal cancers where magnetic resonance imaging (MRI) findings provide essential information that can change treatment. In this review we describe the rationale for the current imaging standards in advanced rectal cancer for both morphological and functional imaging on the baseline staging and reassessment studies. In addition the clinical implications and future methods by which radiologists may improve these are outlined relative to TNM8.
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Affiliation(s)
- P J Brown
- Department of Clinical Radiology, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK.
| | - R Hyland
- Department of Clinical Radiology, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
| | - A J Quyn
- Department of General Surgery, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
| | - N P West
- Pathology and Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Welcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - D Sebag-Montefiore
- Department of Clinical Oncology, Bexley Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
| | - D Jayne
- Department of General Surgery, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
| | - P Sagar
- Department of General Surgery, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
| | - D J Tolan
- Department of Clinical Radiology, Lincoln Wing, St James' University Hospital, Leeds Teaching Hospitals NHS Trust, Beckett Street, Leeds, LS9 7TF, UK
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TALBOT B, Sagar P, Lin R, Jun M, Sen S, Gallagher M. SUN-178 The Impact of Acute Kidney Injury Requiring Haemodialysis on Patient Survival: 10 Years of Prospective Data. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Pierce TT, Shailam R, Lozano-Calderon S, Sagar P. Inter-rater Variability in the Interpretation of Pre and Post Contrast MRI for Pre-Surgical Evaluation of Osteosarcoma in Long Bones in Pediatric Patients and Young Adults. Surg Oncol 2019; 28:135-139. [PMID: 30851887 DOI: 10.1016/j.suronc.2018.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 11/15/2018] [Accepted: 11/24/2018] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVES The value of gadolinium enhanced magnetic resonance imaging (MRI) sequences for extremity osteosarcoma resection planning is unverified. We evaluate the performance of intravenous gadolinium enhanced MRI for identification of neurovascular bundle involvement (NBI) and intraarticular extension (IAE) in patients with osteosarcoma. METHODS Two pediatric radiologists independently analyzed MRI examinations of patients with pathology proven extremity osteosarcoma for NBI and IAE. Initial evaluation utilized only non-contrast MRI images (PRE) and, after 2 weeks, subsequent evaluation included both the pre and post contrast images (POST). Cohen's Kappa and McNemar's test were calculated to assess agreement between PRE and POST image interpretations of NBI and IAE. RESULTS 56 patients with 90 preoperative MRI examinations were analyzed. PRE and POST interpretations were rarely discordant; 4/90 cases for NBI (Kappa 0.91) and 2/90 cases for IAE (Kappa 0.95). McNemar's test did not show a difference between PRE and POST imaging (NBI p=0.62; IAE p=0.48). CONCLUSION No significant difference between PRE and POST image interpretation was found. A high level of agreement between PRE and POST image interpretation suggests that pre-contrast MRI may be sufficient for pre-surgical planning for pediatric patients with long bone osteosarcoma.
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Affiliation(s)
- T T Pierce
- Massachusetts General Hospital, Department of Radiology, 55 Fruit Street Founders 216, Boston, MA, 02114, USA.
| | - R Shailam
- Massachusetts General Hospital, Department of Radiology, Division of Pediatric Radiology, 34 Fruit Street Ellison 237, Boston, MA, 02114, USA.
| | - S Lozano-Calderon
- Department of Orthopedic Surgery, Massachusetts General Hospital, 55 Fruit Street Yawkey Center for Outpatient Care, Suit 3B, Boston, MA, 02114, USA.
| | - P Sagar
- Massachusetts General Hospital, Department of Radiology, Division of Pediatric Radiology, 34 Fruit Street Ellison 237, Boston, MA, 02114, USA.
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Lee M, Wu K, Yu A, Roumiantsev S, Shailam R, Nimkin K, Sagar P. Pulmonary hemorrhage in neonatal respiratory distress syndrome: Radiographic evolution, course, complications and long-term clinical outcomes. J Neonatal Perinatal Med 2019; 12:161-171. [PMID: 31256080 DOI: 10.3233/npm-1867] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND Pulmonary hemorrhage (PH) is occasionally seen in premature infants after surfactant treatment for respiratory distress syndrome (RDS). These infants receive frequent chest radiographs (CXR) during and after hospitalization enabling long-term radiographic-clinical correlation. OBJECTIVE To chart the natural evolution of CXR findings of PH in RDS and correlate radiographic patterns to supplemental oxygen requirement. MATERIALS AND METHODS Retrospective review of clinical notes for gestational age (GA), birth weight (BW), intraventricular hemorrhage (IVH) and oxygen requirement were performed. CXRs were reviewed at 4 time-points; during PH, 28 days postnatal age, 36 weeks and at farthest available clinical follow-up. RESULTS 18 infants born (2003-2016), GA (24-30 weeks); BW (482-1590 grams) were included. Mean onset of PH was 1.94 (0-5) days. 9/18 (50%) had IVH. 3 died during PH; all had IVH. During PH, CXR showed whiteout 9/18 (50%); patchy opacities 5/18 (27%); diffuse haziness 1/18 (6%) and no change 3/18 (17%). At 28 days postnatal age, CXR showed fine-interstitial (FI) markings 14/15 (93%) and whiteout 1/15 (7%). At 36 weeks,12/14 (85%) had FI and 2/14 (15%) developed cystic-interstitial changes. At farthest follow-up, FI 3/13 (23%); coarse-interstitial 4/13 (30%); peri-bronchial cuffing 5/13 (38%); normal 1/13 (9%) and the majority had hyperinflation 9/13 (69%). At discharge, 9/14 (64%) required home-oxygen and 5/14 (36%) were on room-air. At farthest follow-up, 6/14 (42%) required home-oxygen and 8/14 (58%) were on room-air. CONCLUSION Premature infants that survive PH may later develop chronic lung disease of prematurity with an evolving interstitial pattern on CXR that clears overtime as they outgrow the need for supplemental oxygen.
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Affiliation(s)
- M Lee
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - K Wu
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - A Yu
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - S Roumiantsev
- Department of Pediatrics, Division of Neonatology and Newborn Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - R Shailam
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - K Nimkin
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - P Sagar
- Department of Radiology, Division of Pediatric Radiology, Massachusetts General Hospital, Boston, MA, USA
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19
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Husain I, Sagar P, Shukla S, Babu S, Singhai A, Sankhwar SN, Husain N. The Significance of ERG and Androgen Receptor Expression in Adenocarcinoma Prostate. Kathmandu Univ Med J (KUMJ) 2018; 16:277-280. [PMID: 31729338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Background Fusions of transmembrane protease, serine 2 (TMPRSS2) with erythroblast transformation specific transcription factors have been found in prostate cancer. The v-etserythroblastosis virus E26 oncogene homologue (ERG) is a proto-oncogene of the erythroblast transformation specific transcription factor family. TMPRSS2-ERG fusion is the most common molecular alteration present in about 50% of prostatic adenocarcinomas. Androgen receptor (AR) plays a key role in prostate development and is involved in the progression of prostate cancer. Objective To evaluate the significance of combined ERG and AR expression in cases of prostatic adenocarcinoma. Method The study was conducted at Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India. Formalin fixed-paraffin embedded archival prostatic tissue specimens were obtained. A total of 10 cases of prostatic adenocarcinoma were included in the study. Immunohistochemistry for Androgen receptor was done by the standard protocol. Multiplex immunohistochemical staining was done for ERG+CK5 using a primary antibody cocktail of mouse and rabbit antibodies. Result Specific AR immunostaining was exclusively nuclear and was present in all 10 cases in varying intensity. Specific ERG immunostaining was nuclear and was present in seven cases (70%) and absent in three cases (30%). The three cases that were negative for ERG had a Gleason score of ≤ 6 and the AR staining was strong and present in about 90% of the cells. Gleason score was directly related to the ERG staining while AR staining was inversely related to the ERG staining. Conclusion The prognostic value of combined ERG and AR over-expression, its associated genes should be further investigated as potential therapeutic targets in prostate cancer progression. Preliminary data is being presented. Larger prospective studies with survival analysis are essential for prognostic significance.
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Affiliation(s)
- I Husain
- Era's Lucknow Medical College and Hospital, Lucknow, Uttar Pradesh
| | | | - S Shukla
- Dr. Ram Manohar lohia, Institute of Medical Sciences, Lucknow, Uttar Pradesh
| | - S Babu
- King George's Medical University, Lucknow
| | - A Singhai
- King George's Medical University, Lucknow
| | | | - N Husain
- Dr. Ram Manohar lohia, Institute of Medical Sciences, Lucknow, Uttar Pradesh
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20
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Kumar R, Singh A, Sagar P, Behera C, Kumar R. Access to Round Window Niche via Posterior Tympanotomy and Impact of Drilling Its Overhangs: A Cadaveric Descriptive Study. Indian J Otolaryngol Head Neck Surg 2018; 70:510-514. [PMID: 30464907 DOI: 10.1007/s12070-018-1469-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/14/2018] [Indexed: 11/25/2022] Open
Abstract
We intended to study the morphological parameters of round window region and assess the gain in exposure achieved by drilling the round window niche overhang. The Exposure of the round window membrane (RWM) is of prime importance to carry out atraumatic electrode insertion for cochlear implantation. The anatomy of round window has been a subject of considerable debate in literature. Fifty-one Formalin preserved adult cadaveric temporal bones were micro-dissected to carry out an 'optimal' posterior tympanotomy to expose the round window region. The bony overhangs of round window niche (RWN) were next drilled to achieve maximal possible exposure the RWM without violating the annulus of the same. The exposure was classified as per St Thomas' Hospital classification. The round window could not be visualized in 3 bones (5.9%). The commonest morphology of RWN was dome shaped, found in 18 (37.5%) and that of the RWM was oval shaped, found in 14 (29.2%) bones. Pre drilling 41 bones had a > 50% exposure of RWM while post drilling > 50% exposure could be achieved in all the bones except the 3 bones in which RWN could not be visualized to begin with. The drilling of the RWN overhangs exposed RWM in entirety in 91.7% of bones with a visible morphology of RWN pre drilling. RWN and RWM exhibit varied morphology. Drilling of the round window niche overhangs can considerably enhance the exposure of RWM.
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Affiliation(s)
- R Kumar
- 1Department of Otolaryngology and Head and Neck Surgery, Room No.-4057, 4th Floor, Teaching Block, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - A Singh
- 1Department of Otolaryngology and Head and Neck Surgery, Room No.-4057, 4th Floor, Teaching Block, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - P Sagar
- 1Department of Otolaryngology and Head and Neck Surgery, Room No.-4057, 4th Floor, Teaching Block, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - C Behera
- 2Department of Forensic Medicine and Toxicology, All India Institute of Medical Sciences, New Delhi, India
| | - R Kumar
- 1Department of Otolaryngology and Head and Neck Surgery, Room No.-4057, 4th Floor, Teaching Block, All India Institute of Medical Sciences, New Delhi, 110029 India
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21
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Abstract
Scheduling of elective weekend operations is entirely within our control and deaths are therefore preventable.
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Affiliation(s)
- L Hancock
- University Hospital of South Manchester
| | - P Sagar
- St James’ University Hospital, Leeds
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22
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Lee M, Heywood N, Sagar P, Brown S, Fearnhead N. Surgical management of fistulating perianal Crohn's disease – Results of a UK survey. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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King A, Dixon J, Harji D, Sagar P. T4 colon cancers – Elective versus emergency in the modern era. Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Gonsalves S, Brayshaw I, Maslekar S, Hance J, Sagar P, Miskovic D. A new technique of extreme lateral positioning for laparoscopic splenic flexure mobilization. Colorectal Dis 2015; 17:O126-8. [PMID: 25754828 DOI: 10.1111/codi.12942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 12/23/2014] [Indexed: 02/08/2023]
Abstract
AIM This aim of this study was to describe a novel positioning technique that assists in the expeditious mobilization of the splenic flexure without the need for redraping or compromise of port placement. METHOD A prospective case series was studied to evaluate the technique and its ability to facilitate splenic flexure mobilization. RESULTS The technique was used in 12 patients. There were no adverse intra- or postoperative events. The median time (interquartile range) for laparoscopic splenic flexure mobilisation was 10 (9-11.25). CONCLUSION This novel positioning technique is safe and feasible. We include a detailed video that describes and demonstrates the requisites for its safe conduct. We also include intra-operative footage demonstrating the benefits of the patient's position.
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Affiliation(s)
- S Gonsalves
- The John Goligher Colorectal Unit, St James University Hospital, Leeds, UK
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25
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Lewison R, Oro D, Godley B, Underhill L, Bearhop S, Wilson RP, Ainley D, Arcos JM, Boersma PD, Borboroglu PG, Boulinier T, Frederiksen M, Genovart M, González-Solís J, Green JA, Grémillet D, Hamer KC, Hilton GM, Hyrenbach KD, Martínez-Abraín A, Montevecchi WA, Phillips RA, Ryan PG, Sagar P, Sydeman WJ, Wanless S, Watanuki Y, Weimerskirch H, Yorio P. Research priorities for seabirds: improving conservation and management in the 21st century. ENDANGER SPECIES RES 2012. [DOI: 10.3354/esr00419] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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26
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Bansal S, Advani SH, Ambulkar IB, Sagar P, Kanekar P. Prognostic factors responsible for outcome in Hodgkin lymphoma: Analysis from a single center in India. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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27
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Abstract
Retrorectal tumors are uncommon and are usually managed by open surgical excision. Recent advances in laparoscopic techniques have led to the use of laparoscopy for a variety of problems in colorectal surgery, including the excision of retrorectal tumours. This case report, which describes the laparoscopic excision of a benign schwannoma arising from the second sacral nerve root, highlights the benefits of accurate preoperative diagnosis with MR imaging and the advantages of a laparoscopic approach while pointing out principles that should be adhered to when using this approach. The tumour was successfully resected without neural compromise and with a prompt and full postoperative recovery.
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Affiliation(s)
- M Rao
- The John Goligher Colorectal Unit, The General Infirmary at Leeds, Great George Street, Leeds, LS1 3EX, UK
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28
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Hunt L, Morrison C, Lengyel J, Sagar P. Laparoscopic management of an obstructed obturator hernia: should laparoscopic assessment be the default option? Hernia 2008; 13:313-5. [PMID: 18956136 DOI: 10.1007/s10029-008-0438-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2008] [Accepted: 09/19/2008] [Indexed: 12/21/2022]
Abstract
An obturator hernia is a rare diagnosis that is frequently missed. Patients present with few clinical signs to identify the cause, apart from symptoms of intestinal obstruction. Therefore, obturator hernias are often diagnosed at exploratory laparotomy. The use of computed tomography (CT) has increased the chance of definitive preoperative diagnosis. However, despite these advances, patients who present acutely will frequently undergo an open procedure rather than laparoscopy. We present a case of an acute obstructed obturator hernia diagnosed in a 62-year-old female that was successfully managed laparoscopically.
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Affiliation(s)
- L Hunt
- John Goligher Colorectal Unit, Leeds General Infirmary, Great George Street, Leeds, West Yorkshire, LS1 3EX, UK
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29
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Sagar P, Lalitha R, Prasad K, Ranganath K. Evolving a protocol to minimize osteoradionecrosis. Int J Oral Maxillofac Surg 2007. [DOI: 10.1016/j.ijom.2007.08.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
BACKGROUND AND METHODS The exact aetiology of pouchitis is unknown, but an association with dysbiosis has been suggested. This is a retrospective review of 17 studies published between 1985 and 2005, identified by a search of the Medline, Pubmed and Embase databases. RESULTS The methodology of the studies varied widely. Many were performed at a time when the distinction between a healthy and an inflamed pouch was vague; misclassification of patients makes the analysis of data difficult and conclusions uncertain. CONCLUSION The evidence that dysbiosis is a cause of pouchitis is poor. Nevertheless, available data allow the construction of an algorithm to aid management and suggest a structured approach for future research.
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Affiliation(s)
- M Lim
- Department of Colorectal Surgery, Leeds General Infirmary, Leeds, UK.
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31
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Pring C, Hornung B, Burke D, Sagar P. Letter 1: randomized clinical trial of bowel preparation with a single phosphate enema or polyethylene glycol before elective colorectal surgery (Br J Surg 2006; 93: 427-433). Br J Surg 2006; 93:1147; author reply 1147-8. [PMID: 16915583 DOI: 10.1002/bjs.5588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
The Editors welcome topical correspondence from readers relating to articles published in the Journal. Responses should be sent electronically via the BJS website (www.bjs.co.uk). All letters will be reviewed and, if approved, appear on the website. A selection of these will be edited and published in the Journal. Letters must be no more than 250 words in length.
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33
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Messiou C, Chalmers A, Boyle K, Sagar P. Surgery for recurrent rectal carcinoma: The role of preoperative magnetic resonance imaging. Clin Radiol 2006; 61:250-8. [PMID: 16488206 DOI: 10.1016/j.crad.2005.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2005] [Revised: 10/24/2005] [Accepted: 11/01/2005] [Indexed: 12/13/2022]
Abstract
Despite apparent curative resection of rectal carcinoma, local recurrence rates of between 3 and 32% have been reported. For those patients, radical surgical resection offers the only hope of cure. We present a review of the magnetic resonance imaging (MRI) findings and contraindications to curative surgery demonstrated using imaging.
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Abstract
The aim of this study is to determine the usefulness of different patterns of gallbladder mucosal enhancement on contrast-enhanced computed tomography (CT) for differentiating between gangrenous and uncomplicated acute cholecystitis. This retrospective evaluation involved 56 patients with histopathologically proved acute cholecystitis (32 with gangrenous and 24 with uncomplicated acute cholecystitis) who had preoperative contrast-enhanced CT imaging. CT in 38 patients showed a gallbladder mucosal enhancement pattern that could be categorized into continuous, discontinuous, and/or irregular categories. In the other 18 patients, the mucosal enhancement pattern could not be classified due to lack of mucosal enhancement or inadequate mucosal enhancement. On contrast-enhanced CT evaluation, continuous and discontinuous and/or irregular mucosal enhancement patterns were seen in 20 and 18 patients, respectively. Among the 20 patients with continuous mucosal enhancement, 17 had uncomplicated acute cholecystitis. Seventeen of the 18 patients with discontinuous and/or irregular mucosal enhancement had gangrenous cholecystitis. The sensitivity and positive predictive value (PPV) of discontinuous and/or irregular mucosal enhancement in the diagnosis of gangrenous cholecystitis were 30.3% and 94.4% (17 of 18), respectively. The sensitivity and PPV of continuous mucosal enhancement in the diagnosis of uncomplicated acute cholecystitis were 30.3% and 85.5% (17 of 20), respectively. There was a statistically significant difference (p=0.0005) between the PPV of discontinuous and/or irregular (94.4%) and that of continuous (15%) mucosal enhancement for predicting gangrenous cholecystitis. The pattern of gallbladder mucosal enhancement on CT can be used as a reliable criterion for distinguishing acute, uncomplicated cholecystitis from gangrenous cholecystitis.
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Affiliation(s)
- A K Singh
- Division of Abdominal Imaging and Interventional Radiology, Massachusetts General Hospital, White 270, 55 Fruit Street, Boston, MA 02114, USA.
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35
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Abstract
We report computed tomographic findings of two unusual cases of sudden cardiac arrest. The imaging features documented include reflux of contrast into the abdomen as indicated by opacification of renal veins, hepatic veins, inferior vena cava, and hepatic and renal parenchyma. The reflux of contrast into the portal vein in one patient has not been described in the literature. The thoracic findings were reflux of contrast into the coronary sinus, nonopacificaton of the left ventricle with intravenous contrast, and lack of cardiac motion artifact.
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Affiliation(s)
- A K Singh
- Division of Abdominal Imaging and Interventional Radiology, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA
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36
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Abidov A, Hachamovitch R, Friedman JD, Hayes SW, Kang X, Cohen I, Germano G, Berman DS, Kjaer A, Cortsen A, Federspiel M, Hesse B, Holm S, O’Connor M, Dhalla AK, Wong MY, Wang WQ, Belardinelli L, Therapeutics CV, Epps A, Dave S, Brewer K, Chiaramida S, Gordon L, Hendrix GH, Feng B, Pretorius PH, Bruyant PP, Boening G, Beach RD, Gifford HC, King MA, Fessler JA, Hsu BL, Case JA, Gegen LL, Hertenstein GK, Cullom SJ, Bateman TM, Akincioglu C, Abidov A, Nishina H, Kavanagh P, Kang X, Aboul-Enein F, Yang L, Hayes S, Friedman J, Berman D, Germano G, Santana CA, Rivero A, Folks RD, Grossman GB, Cooke CD, Hunsche A, Faber TL, Halkar R, Garcia EV, Hansen CL, Silver S, Kaplan A, Rasalingam R, Awar M, Shirato S, Reist K, Htay T, Mehta D, Cho JH, Heo J, Dubovsky E, Calnon DA, Grewal KS, George PB, Richards DR, Hsi DH, Singh N, Meszaros Z, Thomas JL, Reyes E, Loong CY, Latus K, Anagnostopoulos C, Underwood SR, Kostacos EJ, Araujo LI, Kostacos EJ, Araujo LI, Lewin HC, Hyun MC, DePuey EG, Tanaka H, Chikamori T, Igarashi Y, Harafuji K, Usui Y, Yanagisawa H, Hida S, Yamashina A, Nasr HA, Mahmoud SA, Dalipaj MM, Golanowski LN, Kemp RAD, Chow BJ, Beanlands RS, Ruddy TD, Michelena HI, Mikolich BM, McNelis P, Decker WAV, Stathopoulos I, Duncan SA, Isasi C, Travin MI, Kritzman JN, Ficaro EP, Corbett JR, Allison JS, Weinsaft JW, Wong FJ, Szulc M, Okin PM, Kligfield P, Harafuji K, Chikamori T, Igarashi Y, Tanaka H, Usui Y, Yanagisawa H, Hida S, Ishimaru S, Yamashima A, Giedd KN, Bergmann SR, Shah S, Emmett L, Allman KC, Magee M, Van Gaal W, Kritharides L, Freedman B, Abidov A, Gerlach J, Akincioglu C, Friedman J, Kavanagh P, Miranda R, Germano G, Berman DS, Hayes SW, Damera N, Lone B, Singh R, Shah A, Yeturi S, Prasad Y, Blum S, Heller EN, Bhalodkar NC, Koutelou M, Kollaros N, Theodorakos A, Manginas A, Leontiadis E, Kouzoumi A, Cokkinos D, Mazzanti M, Marini M, Cianci G, Perna GP, Pai M, Greenberg MD, Liu F, Frankenberger O, Kokkinos P, Hanumara D, Goheen E, Wu C, Panagiotakos D, Fletcher R, Greenberg MD, Liu F, Frankenberger O, Kokkinos P, Hanumara D, Goheen E, Rodriguez OJ, Iyer VN, Lue M, Hickey KT, Blood DK, Bergmann SR, Bokhari S, Chareonthaitawee P, Christensen SD, Allen JL, Kemp BJ, Hodge DO, Ritman EL, Gibbons RJ, Smanio P, Riva G, Rodriquez F, Tricoti A, Nakhlawi A, Thom A, Pretorius PH, King MA, Dahlberg S, Leppo J, Slomka PJ, Nishina H, Berman DS, Akincioglu C, Abidov A, Friedman JD, Hayes SW, Germano G, Petrovici R, Husain M, Lee DS, Nanthakumar K, Iwanochko RM, Brunken RC, DiFilippo F, Neumann DR, Bybel B, Herrington B, Bruckbauer T, Howe C, Lohmann K, Hayden C, Chatterjee C, Lathrop B, Brunken RC, Chen MS, Lohmann KA, Howe WC, Bruckbauer T, Kaczur T, Bybel B, DiFilippo FP, Druz RS, Akinboboye OA, Grimson R, Nichols KJ, Reichek N, Ngai K, Dim R, Ho KT, Pary S, Ahmed SU, Ahlberg A, Cyr G, Vitols PJ, Mann A, Alexander L, Rosenblatt J, Mieres J, Heller GV, Ahmed SU, Ahlberg AW, Cyr G, Navare S, O’Sullivan D, Heller GV, Chiadika S, Lue M, Blood DK, Bergmann SR, Bokhari S, Heston TF, Heller GV, Cerqueira MD, Jones PG, Bryngelson JR, Moutray KL, Gegen LL, Hertenstein GK, Moser K, Case JA, Zellweger MJ, Burger PC, Pfisterer ME, Mueller-Brand J, Kang WJ, Lee BI, Lee DS, Paeng JC, Lee JS, Chung JK, Lee MC, To BN, O’Connell WJ, Botvinick EH, Duvall WL, Croft LB, Einstein AJ, Fisher JE, Haynes PS, Rose RK, Henzlova MJ, Prasad Y, Vashist A, Blum S, Sagar P, Heller EN, Kuwabara Y, Nakayama K, Tsuru Y, Nakaya J, Shindo S, Hasegawa M, Komuro I, Liu YH, Wackers F, Natale D, DePuey G, Taillefer R, Araujo L, Kostacos E, Allen S, Delbeke D, Anstett F, Kansal P, Calvin JE, Hendel RC, Gulati M, Pratap P, Takalkar A, Kostacos E, Alavi A, Araujo L, Melduni RM, Duncan SA, Travin MI, Isasi CR, Rivero A, Santana C, Esiashvili S, Grossman G, Halkar R, Folks RD, Garcia EV, Su H, Dobrucki LW, Chow C, Hu X, Bourke BN, Cavaliere P, Hua J, Sinusas AJ, Spinale FG, Sweterlitsch S, Azure M, Edwards DS, Sudhakar S, Chyun DA, Young LH, Inzucchi SE, Davey JA, Wackers FJ, Noble GL, Navare SM, Calvert J, Hussain SA, Ahlberg AM, Katten DM, Boden WE, Heller GV, Shaw LJ, Yang Y, Antunes A, Botelho MF, Gomes C, de Lima JJP, Silva ML, Moreira JN, Simões S, GonÇalves L, Providência LA, Elhendy A, Bax JJ, Schinkel AF, Valkema R, van Domburg RT, Poldermans D, Arrighi J, Lampert R, Burg M, Soufer R, Veress AI, Weiss JA, Huesman RH, Gullberg GT, Moser K, Case JA, Loong CY, Prvulovich EM, Reyes E, Aswegen AV, Anagnostopoulos C, Underwood SR, Htay T, Mehta D, Sun L, Lacy J, Heo J, Brunken RC, Kaczur T, Jaber W, Ramakrishna G, Miller TD, O’connor MK, Gibbons RJ, Bural GG, Mavi A, Kumar R, El-Haddad G, Srinivas SM, A Alavi, El-Haddad G, Alavi A, Araujo L, Thomas GS, Johnson CM, Miyamoto MI, Thomas JJ, Majmundar H, Ryals LA, Ip ZTK, Shaw LJ, Bishop HA, Carmody JP, Greathouse WG, Yanagisawa H, Chikamori T, Tanaka H, Usui Y, Igarashi U, Hida S, Morishima T, Tanaka N, Takazawa K, Yamashina A, Diedrichs H, Weber M, Koulousakis A, Voth E, Schwinger RHG, Mohan HK, Livieratos L, Gallagher S, Bailey DL, Chambers J, Fogelman I, Sobol I, Barst RJ, Nichols K, Widlitz A, Horn E, Bergmann SR, Chen J, Galt JR, Durbin MK, Ye J, Shao L, Garcia EV, Mahenthiran J, Elliott JC, Jacob S, Stricker S, Kalaria VG, Sawada S, Scott JA, Aziz K, Yasuda T, Gewirtz H, Hsu BL, Moutray K, Udelson JE, Barrett RJ, Johnson JR, Menenghetti C, Taillefer R, Ruddy T, Hachamovitch R, Jenkins SA, Massaro J, Haught H, Lim CS, Underwood R, Rosman J, Hanon S, Shapiro M, Schweitzer P, VanTosh A, Jones S, Harafuji K, Giedd KN, Johnson NP, Berliner JI, Sciacca RR, Chou RL, Hickey KT, Bokhari SS, Rodriguez O, Bokhari S, Moser KW, Moutray KL, Koutelou M, Theodorakos A, Kollaros N, Manginas A, Leontiadis E, Cokkinos D, Mazzanti M, Marini M, Cianci G, Perna GP, Nanasato M, Fujita H, Toba M, Nishimura T, Nikpour M, Urowitz M, Gladman D, Ibanez D, Harvey P, Floras J, Rouleau J, Iwanochko R, Pai M, Guglin ME, Ginsberg FL, Reinig M, Parrillo JE, Cha R, Merhige ME, Watson GM, Oliverio JG, Shelton V, Frank SN, Perna AF, Ferreira MJ, Ferrer-Antunes AI, Rodrigues V, Santos F, Lima J, Cerqueira MD, Magram MY, Lodge MA, Babich JW, Dilsizian V, Line BR, Bhalodkar NC, Lone B, Singh R, Prasad Y, Yeturi S, Blum S, Heller EN, Rodriguez OJ, Skerrett D, Charles C, Shuster MD, Itescu S, Wang TS, Bruyant PP, Pretorius PH, Dahlberg S, King MA, Petrovici R, Iwanochko RM, Lee DS, Emmett L, Husain M, Hosokawa R, Ohba M, Kambara N, Tadamura E, Kubo S, Nohara R, Kita T, Thompson RC, McGhie AI, O’Keefe JH, Christenson SD, Chareonthaitawee P, Kemp BJ, Jerome S, Russell TJ, Lowry DR, Coombs VJ, Moses A, Gottlieb SO, Heiba SI, Yee G, Coppola J, Elmquist T, Braff R, Youssef I, Ambrose JA, Abdel-Dayem HM, Canto J, Dubovsky E, Scott J, Terndrup TE, Faber TL, Folks RD, Dim UR, Mclaughlin J, Pollepalle D, Schapiro W, Wang Y, Akinboboye O, Ngai K, Druz RS, Polepalle D, Phippen-Nater B, Leonardis J, Druz R. Abstracts of original contributions ASNC 2004 9th annual scientific session September 3-–October 3, 2004 New York, New York. J Nucl Cardiol 2004. [DOI: 10.1007/bf02974964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Boyle K, Stojkovic S, Balfour L, Finan P, Burke D, Sagar P. Colorectal 09. Br J Surg 2002. [DOI: 10.1046/j.1365-2168.89.s.1.8_3.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Affiliation(s)
- A K Singh
- Department of Diagnostic Radiology, William Beaumont Hospital, Royal Oak, Michigan, USA
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Affiliation(s)
- A K Singh
- Department of Diagnostic Radiology, William Beaumont Hospital, Royal Oak, Michigan, USA.
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Affiliation(s)
- A K Singh
- Department of Diagnostic Radiology, William Beaumont Hospital, Royal Oak, Michigan 48073, USA.
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Abstract
PURPOSE To compare the diagnostic yield of fine-needle aspiration biopsy (FNAB) and cutting needle biopsy in thoracic lesions. MATERIAL AND METHODS Thirty patients with thoracic mass lesions were subjected to ultrasound-guided co-axial FNAB and cutting needle biopsy using 0.7 mm aspirating and 1.0-mm cutting needles, respectively. The diagnostic yield of the individual modalities was compared with the combined yield. RESULTS A conclusive diagnosis was obtained in 76.6% (n=23) of patients by FNAB and in 66.6% (n=20) by cutting needle biopsy. The combined diagnostic yield of FNAB and cutting needle biopsy was 93.3% (n=28) with a significant statistical difference (p<0.03) as compared to cutting biopsy alone. Of the patients, 23.2% (n=7) had benign and 76.6% (n=23) malignant aetiologies. The diagnostic yield of FNAB versus cutting needle biopsy in benign lesions was 57.1% (n=4) and 100% (n=7), respectively. The diagnostic yield of FNAB versus cutting needle biopsy in malignant lesions was 82.6% (n=19) and 56.5%, (n=13). Two patients remained undiagnosed by either modality. There were no complications. CONCLUSION FNAB and cutting needle biopsy are complementary to each other and attempts should be made to obtain small tissue cores in addition to routine cytologic specimens in diagnosing thoracic lesions, especially in benign pathologies. US provides a safe guidance modality for lesions abutting the chest wall.
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Affiliation(s)
- P Sagar
- Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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Sagar P, Gulati M, Gupta SK, Gupta S, Shankar S, Joshi K, Jindal SK, Suri S. ULTRASOUND-GUIDED TRANSTHORACIC CO-AXIAL BIOPSY OF THORACIC MASS LESIONS. Acta Radiol 2000. [DOI: 10.1034/j.1600-0455.2000.041006529.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Migration of monocytes into the subendothelial space of the aorta has been considered to be an important event in the development of atherosclerosis. Because hypertension is commonly associated with atherosclerosis, we studied the effect of applied pressure on the migration of monocytes. Direct applied pressure increased the migration (P < .001) of monocytes across a filter when compared with normal atmospheric pressure. The migration of monocytes was found to be directly related to the amount of the applied pressure. Amlodipine, a calcium channel blocker, attenuated the migration of monocytes under normal as well as increased pressure conditions in a dose-dependent manner. These studies provide a basis to speculate on the role of direct pressure in the migration of monocytes into the subendothelial space and the possibility that vasoactive agents may modulate the migration of monocytes independent of their pressure-lowering effect.
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Affiliation(s)
- P C Singhal
- Department of Medicine, Long Island Jewish Medical Center, Albert Einstein College of Medicine, New Hyde Park 11040, USA
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Abstract
PURPOSE This study was designed to describe recurrence and survival rates after operative treatment for anorectal melanoma and to identify predictive factors for recurrence. METHODS Records of 50 patients with anorectal melanoma from 1939 to 1993 were reviewed. RESULTS Overall five-year survival and disease-free survival were 22 and 16 percent, respectively. At the time of diagnosis, 26 percent of patients had metastatic disease, and all died within 12 (mean, 6.3) months. Five-year survival and recurrence rates were identical after either abdominoperineal resection (APR) or wide local excision, both with curative intent. Gender, size of tumor, presence of melanin, positive perirectal lymph nodes, or treatment were not predictive of recurrence. Anorectal melanoma was found incidentally after hemorrhoidectomy or polypectomy in five patients. Three other patients underwent an excisional biopsy of a lesion measuring less than 2 cm. Of these eight patients, five underwent APR and three underwent wide local excision with no microscopic residual tumor at pathology. All developed regional or systemic recurrence at a mean of 21 (range, 4-88) months, and all died of their disease at a mean of 29 (range, 5-98) months. CONCLUSION Prognosis for anorectal melanoma is poor, irrespective of surgical treatment performed. No predictive factors for recurrence were identified in this series. Wide local excision with a negative margin of a least 1 cm is suggested as the treatment of choice. APR should be reserved for tumor not amenable to local excision or for palliative treatment of large obstructive lesion until effective adjuvant therapies are available.
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Affiliation(s)
- C Thibault
- Division of Colon and Rectal Surgery, Mayo Clinic and Mayo Foundation, Rochester, Minnesota 55905, USA
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Wakefield T, Sagar P. Whither child psychiatry? Aust N Z J Psychiatry 1996; 30:426. [PMID: 8839958 DOI: 10.3109/00048679609065011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Abstract
A 1-year prospective analysis was undertaken of all non-day-case general surgery in a district general hospital. Using the Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity (POSSUM) scoring system 3004 patients were assessed. From the predictions of mortality and morbidity so obtained, a quality measure, the ratio of observed to expected numbers of deaths and complications (O:E ratio) was determined for each surgeon, both overall and within specialty zones. The present study demonstrates the serious hazard in using 'raw' uncorrected mortality and morbidity statistics to compare surgeon performance. Mortality rates varied from 1.0 to 4.9 per cent whereas O:E ratios ranged from 0.83 to 1.06; morbidity rates varied from 5.3 to 12.6 per cent with O:E ratios 0.86-1.02. Great misunderstanding may result from the publication of surgeon or hospital 'league tables'. The present study demonstrates a technique that might allow surgeon performance to be monitored adequately and accurately.
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Sagar P, Wai D, Poon P, Macfie J, Mitchell C. The effects of major abdominal surgery, enteral and parenteral nutrition on pancreatic function and morphology. Clin Nutr 1994; 13:314-8. [PMID: 16843405 DOI: 10.1016/0261-5614(94)90055-8] [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: 03/03/1994] [Accepted: 05/02/1994] [Indexed: 10/26/2022]
Abstract
The effects of major abdominal surgery and nutritional support upon pancreatic function and morphology were studied in similar groups of patients who underwent major abdominal surgery (n = 18), received parenteral nutritional support (n = 18) or received enteral nutritional support (n = 16). The exocrine function of the pancreas was measured by means of an oral pancreatic function test (using 1 g of N-benzoyl-L-tyrosyl para-aminobenzoic acid) with measurement of serum para-aminobenzoic acid at 3 h and the Pancreatic Excretion Index. Pancreatic morphology was assessed by real time ultrasound and a pancreatic size index was calculated (maximum diameter of head x body). Serial measurements of function and morphology were carried out in each patient at entry into the study and at 7 and 14 days after operation or start of nutritional support. Serum PABA levels were similar in the 3 groups at the start of the study. Although the levels remained unchanged in the enteral and parenteral groups, a significant and progressive decrease was observed in the surgical group (serum PABA = 27.5 nmol/l (24.0-30.6) before operation, 10.5 nmol/l (5.5-13.4) 14 days after operation, P < 0.01). No significant changes in pancreatic size were seen. Parenteral and enteral nutrition preserves pancreatic exocrine function. A dramatic reduction in pancreatic exocrine function is seen after major abdominal surgery.
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Affiliation(s)
- P Sagar
- Scarborough Hospital, Scalby Road, Scarborough, North Yorkshire, UK
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Abstract
BACKGROUND/AIMS Gut translocation of enteric organisms across the intact intestinal mucosa has been postulated as a potential source of sepsis in susceptible patients. However, little is known of its occurrence or significance in humans. The aim of this study was to determine the prevalence of gut translocation of bacteria in humans and attempt to identify any predisposing factors to its occurrence. METHODS A consecutive series of 267 general surgical patients were examined for evidence of bacterial translocation by bacterial analysis of intestinal serosa and mesenteric lymph nodes taken at the time of surgery. RESULTS Translocation occurred in 10.3% of patients overall. Both aerobic and anaerobic bacteria translocated. Excluding patients with distal intestinal obstruction and those with inflammatory bowel disease in whom translocation was more common, the prevalence was 5%. Neither jaundice, nutritional status, nor total parenteral nutrition predisposed to translocation. Similarly, mucosal atrophy did not predispose to this phenomenon. The development of postoperative septic complications was twice as common in patients with translocation as in those without, but mortality was unaffected. CONCLUSIONS Translocation occurs as a spontaneous event in humans, but its clinical significance remains to be defined.
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Affiliation(s)
- P C Sedman
- Combined Gastroenterology Unit, Scarborough District Hospital, North Yorkshire, England
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