Dr.Manu K Nayar | Health Care

1. Endoscopic management of ampullary tumors: European Society of Gastrointestinal Endoscopy (ESGE) Guideline.

Vanbiervliet G, Strijker M, Arvanitakis M, Aelvoet A, Arnelo U, Beyna T, Busch O, Deprez PH, Kunovsky L, Larghi A, Manes G, Moss A, Napoleon B, Nayar M, Pérez-Cuadrado-Robles E, Seewald S, Barthet M, van Hooft JE. Endoscopy. 2021 Apr;53(4):429-448 April 2021

2.Effect of the SARS-CoV2 Pandemic on Endoscopy Provision - The Impact of Compliance with National Guidance.

Leeds JS, Awadelkarim B, Dipper C, Nayar MK, Oppong KW, Nylander DL. Expert Rev Gastroenterol Hepatol. 2021 Apr;15(4):459-464 April 2021

3.Novel multidisciplinary hub-and-spoke tertiary service for the management of severe acute pancreatitis.

Nayar MK, Bekkali NLH, Bourne D, Young S, Leeds JS, Oppong KW, Logue JL, Sen G, French JJ, Scott J, Cressey D, Pandanaboyana S, Charnley RM. BMJ Open Gastroenterol. 2021 Mar;8(1):e000501. doi: 10.1136/bmjgast-2020-000501 March 2021

4.Endoscopic transmural drainage is associated with improved outcomes in disconnected pancreatic duct syndrome: a systematic review and meta-analysis.

Chong E, Ratnayake CB, Saikia S, Nayar M, Oppong K, French JJ, Windsor JA, Pandanaboyana S. BMC Gastroenterol. 2021 Feb 25;21(1):87. doi: 10.1186/s12876-021-01663-2. Feb 2021

5.SARS-CoV-2 infection in acute pancreatitis increases disease severity and 30-day mortality: COVID PAN collaborative study

Pandanaboyana S, Moir J, Leeds JS, Oppong K, Kanwar A, Marzouk A, Belgaumkar A, Gupta A, Siriwardena AK, Haque AR, Awan A, Balakrishnan A, Rawashdeh A, Ivanov B, Parmar C, M Halloran C, Caruana C, Borg CM, Gomez D, Damaskos D, Karavias D, Finch G, Ebied H, K Pine J, R A Skipworth J, Milburn J, Latif J, Ratnam Apollos J, El Kafsi J, Windsor JA, Roberts K, Wang K, Ravi K, V Coats M, Hollyman M, Phillips M, Okocha M, Sj Wilson M, A Ameer N, Kumar N, Shah N, Lapolla P, Magee C, Al-Sarireh B, Lunevicius R, Benhmida R, Singhal R, Balachandra S, Demirli Atıcı S, Jaunoo S, Dwerryhouse S, Boyce T, Charalampakis V, Kanakala V, Abbas Z, Nayar M; COVID PAN collaborative group. Gut. 2021 Feb 5:gutjnl-2020-323364. doi: 10.1136/gutjnl-2020-323364. Online ahead of print. Feb 2021

6.Impact of pancreatic enzyme replacement therapy on short- and long-term outcomes in advanced pancreatic cancer: meta-analysis of randomized controlled trials.

Ammar K, Leeds JS, Ratnayake CB, Sen G, French JJ, Nayar M, Oppong KW, Loveday BP, Pandanaboyana S. Expert Rev Gastroenterol Hepatol. 2021 Feb 15:1-7. Feb 2021

7.Utility of endoscopic ultrasound-guided fine-needle biopsy in the diagnosis of type 1 autoimmune pancreatitis.

Oppong KW, Maheshwari P, Nayar MK, Darne A, Parkinson D, Leeds JS, Haugk B. Endosc Int Open. 2020 Dec;8(12):E1855-E1861. doi: 10.1055/a-1236-3266. Dec 2020

8.A Network Meta-analysis of Surgery for Chronic Pancreatitis: Impact on Pain and Quality of Life.

Ratnayake CBB, Kamarajah SK, Loveday BPT, Nayar M, Oppong K, White S, French JJ, Windsor JA, Pandanaboyana S. J Gastrointest Surg. 2020 Dec;24(12):2865-2873. Dec 2020

9.British Society of Gastroenterology position statement on patient experience of GI endoscopy.

Rees CJ, Trebble TM, Von Wagner C, Clapham Z, Hewitson P, Barr H, Everett S, Griffiths H, Nayar M, Oppong K, Riley S, Stebbing J, Thomas-Gibson S, Bevan R. Gut. 2020 Sep;69(9):1. doi: 10.1136/gutjnl-2019-319207. Sep 2020

10.Recurrence Patterns for Pancreatic Ductal Adenocarcinoma after Upfront Resection Versus Resection Following Neoadjuvant Therapy: A Comprehensive Meta-Analysis.

Ratnayake B, Savastyuk AY, Nayar M, Wilson CH, Windsor JA, Roberts K, French JJ, Pandanaboyana S. J Clin Med. 2020 Jul 6;9(7):2132. doi: 10.3390/jcm9072132 July 2020

11.Fork-tip needle biopsy versus fine-needle aspiration in endoscopic ultrasound-guided sampling of solid pancreatic masses: a randomized crossover study.

Oppong KW, Bekkali NLH, Leeds JS, Johnson SJ, Nayar MK, Darné A, Egan M, Bassett P, Haugk B. Endoscopy. 2020 Jun;52(6):454-461 June 2020

12.Hematopoietic Cell Transplant-Related Toxicities and Mortality in Frail Recipients.

Pamukcuoglu M, Bhatia S, Weisdorf DJ, DeFor TE, Ustun C, Nayar M, Holtan SG, Jurdi NE, Thyagarajan B, Brunstein CG, Bachanova V, Warlick ED, Severseike B, Te HS, Lund T, Arora M. Biol Blood Marrow Transplant. 2019 Dec;25(12):2454-2460. Dec 2019

13.Endoscopic ultrasound-guided fine-needle biopsy is superior to fine-needle aspiration in assessing pancreatic neuroendocrine tumors.

Leeds JS, Nayar MK, Bekkali NLH, Wilson CH, Johnson SJ, Haugk B, Darne A, Oppong KW. Endosc Int Open. 2019 Oct;7(10):E1281-E1287. Oct 2019

14.Pancreatic cystic lesions: risk stratification and management based on recent guidelines.

Stutchfield BM, Nayar M, Penman ID. Frontline Gastroenterol. 2019 Apr;10(2):182-187. April 2019

15.Does IgG4 level at the time of diagnosis correlate with disease outcome in IgG4-Related disease?

Tsang KFP, Oppong WK, Leeds SJ, Bekkali LHN, Nayar KM. Pancreatology. 2019 Jan 19(1):177-181 Jan 2019

16.Impact of metal and plastic stents on endoscopic ultrasound-guided aspiration cytology and core histology of head of pancreas masses.

Bekkali NLH, Nayar MK, Leeds JS, Thornton L, Johnson SJ, Haugk B, Darné A, Howard-Tripp N, Charnley RM, Bassett P, Oppong KW. Endoscopy. 2019 Jan 17. doi: 10.1055/a-0824-6982. Jan 2019

17.Novel temperature-controlled RFA probe for treatment of blocked metal biliary stents in patients with pancreaticobiliary cancers: initial experience.

Nayar MK, Oppong KW, Bekkali NLH, Leeds JS. Endosc Int Open. 2018 May 6(5):E513-E517. doi: 10.1055/s-0044-102097. 2018 Apr 18. May 2018

18.Multicenter experience from the UK and Ireland of use of lumen-apposing metal stent for transluminal drainage of pancreatic fluid collections.

Venkatachalapathy SV, Bekkali N, Pereira S, Johnson G, Oppong K, Nayar M, Leeds J, Paranandi B, Penman I, Carroll N, Godfrey E, James M, Aithal G, McKay C, Devlin J, Wong T, Makin A, Ryan B, Huggett M. Endosc Int Open. 2018 Mar 6(3):E259-E265. doi: 10.1055/s-0043-125362. Epub 2018 Feb 28. Mar 2018

19.A comparison of outcomes between a lumen-apposing metal stent with electrocautery-enhanced delivery system and a bi-flanged metal stent for drainage of walled-off pancreatic necrosis.

Bekkali NLH, Nayar MK, Leeds JS, Charnley RM, Huggett MT, Oppong KW. Endosc Int Open. 2017 Dec 5(12):E1189-E1196. doi: 10.1055/s-0043-120831. Epub 2017 Nov 21. Dec 2017

20.A comparison of outcomes between a lumen-apposing metal stent with electrocautery-enhanced delivery system and a bi-flanged metal stent for drainage of walled-off pancreatic necrosis.

Venkatachalapathy S, Nayar MK. Therapeutic endoscopic ultrasound. Frontline Gastroenterol. 2017 2017

21.Lumen-apposing metal stents for pancreatic fluid collection drainage: may not be business as usual.

Leeds JS, Nayar MK, Charnley RM, Oppong KW. Gut. 2016 2016

22.Comparison of the diagnostic performance of 2 core biopsy needles for EUS-guided tissue acquisition from solid pancreatic lesions.

Nayar MK, Paranandi B, Dawwas MF, Leeds JS, Darne A, Haugk B, Majumdar D, Ahmed MM, Oppong KW. Gastrointest Endosc. 2016 2016

23.Diagnostic yield of secretin-enhanced magnetic resonance cholangiopancreatography in the investigation of patients with acalculous biliary pain.

Dronamraju S, Scott J, Oppong K, Nayar M. Ann Gastroenterol. 2016 2016

24.Endoscopic cholecystogastrostomy in a patient with gallbladder empyema secondary to cholangiocarcinoma.

Paranandi B, Nayar M, Scott J, Charnley R, Wilson C, Oppong K. Endoscopy. 2016 2016

25.EUS and EUS-FNA diagnosis of suspected pancreatic cystic neoplasms: Is the sum of the parts greater than the CEA?

Oppong KW, Dawwas MF, Charnley RM, Wadehra V, Elamin K, White S, Nayar M. Pancreatology. 2015 2015

26.Endoscopic drainage of walled-off pancreatic necrosis using a novel self-expanding metal stent.

Huggett MT, Oppong KW, Pereira SP, Keane MG, Mitra V, Charnley RM, Nayar MK. Endoscopy 2015 2015

27.Diagnostic performance of endoscopic ultrasound (EUS)/endoscopic ultrasound--fine needle aspiration (EUS-FNA) cytology in solid and cystic pancreatic neuroendocrine tumours.

Mitra V, Nayar MK, Leeds JS, Wadehra V, Haugk B, Scott J, Charnley RM, Oppong KW. J Gastrointestin Liver Dis. 2015 2015

28.Autoimmune pancreatitis - diagnosis, management and longterm follow-up.

Chatterjee S, Oppong KW, Scott JS, Jones DE, Charnley RM, Manas DM, Jaques BC, White SA, French JJ, Sen GS, Haugk B, Nayar MK. J Gastrointestin Liver Dis. 2014 2014

29.Endoscopic ultrasound in patients with normal liver blood tests and unexplained dilatation of common bile duct and or pancreatic duct.

Oppong KW, Mitra V, Scott J, Anderson K, Charnley RM, Bonnington S, Jaques B, White S, French JJ, Manas DM, Sen G, Nayar MK. Scand J Gastroenterol. 2014 2014

30.Endoscopic ultrasound diagnosis of an ERCP-related portobiliary fistula.

Dawwas MF, Oppong KW, John SK, Vallance AE, French JJ, Scott J, Nayar MK. Endoscopy. 2013 2013

31.Comparison of endoscopic ultrasound and computed tomography in the assessment of pancreatic cyst size using pathology as the gold standard.

Leeds JS, Nayar MK, Dawwas M, Scott J, Anderson K, Haugk B, Oppong KW. Pancreatology. 2013 2013

32.Does on-site adequacy assessment by cytotechnologists improve results of EUS guided FNA of solid pancreaticobiliary lesions?

Nayar MK, Chatterjee S, Wadehra V, Cunningham J, Leeds J, Oppong K JOP. 2013 2013

33.Diagnostic accuracy of quantitative EUS elastography for discriminating malignant from benign solid pancreatic masses: a prospective, single-center study.

Dawwas MF, Taha H, Leeds JS, Nayar MK, Oppong KW Gastrointest Endosc. 2012 2012

34.Endoscopic botulinum toxin injection for the treatment of diabetic gastropathy in pancreas and islet-cell transplant patients.

Thomas MP, Wilson CH, Nayar M, Manus DM, Walker M, Shaw J, White SA. Exp Clin Transplant. 2012 2012

35.Role of EUS/EUS-guided FNA in the management of proximal biliary strictures.

Nayar MK, Manas DM, Wadehra V, Oppong KE Hepatogastroenterology. 2011 2011

36.Effect of dedicated and supervised training on achieving competence in EUS-FNA of solid pancreatic lesions.

Nayar M, Joy D, Wadehra V, Oppong K. Scand J Gastroenterol. 2011 2011

37.Endoscopic ultrasound-guided gastroenterostomy for palliative drainage of an obstructed hepaticojejunostomy loop.

Chatterjee S, Ibrahim B, Charnley RM, Scott J, Nayar M. Endoscopy. 2011 2011

38.EUS-FNA versus biliary brushings and assessment of simultaneous performance in jaundiced patients with suspected malignant obstruction.

Oppong K, Raine D, Nayar M, Wadehra V, Ramakrishnan S, Charnley RM

39.Autoimmune pancreatitis with multiorgan involvement. A case of pericardial involvement.

Nayar M, Charnley R, Scott J, Haugk B, Oppong K. JOP. 2009 2009

40.The use of a mechanical lithotripsy device as an adjunct to common bile duct exploration.

Robinson SM, Al-Mukhtar A, Nayar M, White SA. Ann R Coll Surg Engl. 2009 2009

41.Mesalazine-induced jaundice, eosonophilia, and thrombocytopenia.

Nayar M, Cunliffe W, Cross P, Oppong K. Inflamm Bowel Dis. 2008 2008

42.TIPSS in the treatment of ectopic variceal bleeding.

Nayar M, Saravanan R, Rowlands PC, McWilliams RG, Evans J, Sutton RJ, Gilmore IT, Smart HL, Lombard MG. Hepatogastroenterology. 2006 2006

43.Transjugular intrahepatic portosystemic stent shunt: 11 years' experience at a regional referral centre.

Saravanan R, Nayar M, Gilmore IT, Smart H, McWilliams RG, Rowlands PC, Evans J, Murphy M, Gould D, Taylor S, Sutton R, Lombard MG. Eur J Gastroenterol Hepatol. 2005 2005

44.Pseudocystoesophagitis: esophagitis and stricture due to pancreatic pseudocyst.

Nayar MK, Leiper KL, Lombard MG JOP. 2005 2005

45.Enhanced Escherichia coli adherence and invasion in Crohn's disease and colon cancer.

Martin HM, Campbell BJ, Hart CA, Mpofu C, Nayar M, Singh R, Englyst H, Williams HF, Rhodes JM. Gastroenterology. 2004 2004

46.Management of inflammatory bowel disease.

Nayar M, Rhodes JM. Postgrad Med J. 2004 2004

01.Does IgG4 level at the time of diagnosis correlate with disease outcome in IgG4-Related disease?

Tsang KFP, Oppong WK, Leeds SJ, Bekkali LHN, Nayar KM. Pancreatology. 2019 Jan 19(1):177-181

02.Impact of metal and plastic stents on endoscopic ultrasound-guided aspiration cytology and core histology of head of pancreas masses.

Bekkali NLH, Nayar MK, Leeds JS, Thornton L, Johnson SJ, Haugk B, Darné A, Howard-Tripp N, Charnley RM, Bassett P, Oppong KW. Endoscopy. 2019 Jan 17. doi: 10.1055/a-0824-6982.

03.Novel temperature-controlled RFA probe for treatment of blocked metal biliary stents in patients with pancreaticobiliary cancers: initial experience.

Nayar MK, Oppong KW, Bekkali NLH, Leeds JS. Endosc Int Open. 2018 May 6(5):E513-E517. doi: 10.1055/s-0044-102097. 2018 Apr 18.

04.Multicenter experience from the UK and Ireland of use of lumen-apposing metal stent for transluminal drainage of pancreatic fluid collections.

Venkatachalapathy SV, Bekkali N, Pereira S, Johnson G, Oppong K, Nayar M, Leeds J, Paranandi B, Penman I, Carroll N, Godfrey E, James M, Aithal G, McKay C, Devlin J, Wong T, Makin A, Ryan B, Huggett M. Endosc Int Open. 2018 Mar 6(3):E259-E265. doi: 10.1055/s-0043-125362. Epub 2018 Feb 28.

05.A comparison of outcomes between a lumen-apposing metal stent with electrocautery-enhanced delivery system and a bi-flanged metal stent for drainage of walled-off pancreatic necrosis.

Bekkali NLH, Nayar MK, Leeds JS, Charnley RM, Huggett MT, Oppong KW. Endosc Int Open. 2017 Dec 5(12):E1189-E1196. doi: 10.1055/s-0043-120831. Epub 2017 Nov 21.

06.A comparison of outcomes between a lumen-apposing metal stent with electrocautery-enhanced delivery system and a bi-flanged metal stent for drainage of walled-off pancreatic necrosis.

Venkatachalapathy S, Nayar MK. Therapeutic endoscopic ultrasound. Frontline Gastroenterol. 2017

07.Lumen-apposing metal stents for pancreatic fluid collection drainage: may not be business as usual.

Leeds JS, Nayar MK, Charnley RM, Oppong KW. Gut. 2016

08.Comparison of the diagnostic performance of 2 core biopsy needles for EUS-guided tissue acquisition from solid pancreatic lesions.

Nayar MK, Paranandi B, Dawwas MF, Leeds JS, Darne A, Haugk B, Majumdar D, Ahmed MM, Oppong KW. Gastrointest Endosc. 2016

09.Diagnostic yield of secretin-enhanced magnetic resonance cholangiopancreatography in the investigation of patients with acalculous biliary pain.

Dronamraju S, Scott J, Oppong K, Nayar M. Ann Gastroenterol. 2016

10.Endoscopic cholecystogastrostomy in a patient with gallbladder empyema secondary to cholangiocarcinoma.

Paranandi B, Nayar M, Scott J, Charnley R, Wilson C, Oppong K. Endoscopy. 2016

11.EUS and EUS-FNA diagnosis of suspected pancreatic cystic neoplasms: Is the sum of the parts greater than the CEA?

Oppong KW, Dawwas MF, Charnley RM, Wadehra V, Elamin K, White S, Nayar M. Pancreatology. 2015

12.Endoscopic drainage of walled-off pancreatic necrosis using a novel self-expanding metal stent.

Huggett MT, Oppong KW, Pereira SP, Keane MG, Mitra V, Charnley RM, Nayar MK. Endoscopy 2015

13.Diagnostic performance of endoscopic ultrasound (EUS)/endoscopic ultrasound--fine needle aspiration (EUS-FNA) cytology in solid and cystic pancreatic neuroendocrine tumours.

Mitra V, Nayar MK, Leeds JS, Wadehra V, Haugk B, Scott J, Charnley RM, Oppong KW. J Gastrointestin Liver Dis. 2015

14.Autoimmune pancreatitis - diagnosis, management and longterm follow-up.

Chatterjee S, Oppong KW, Scott JS, Jones DE, Charnley RM, Manas DM, Jaques BC, White SA, French JJ, Sen GS, Haugk B, Nayar MK. J Gastrointestin Liver Dis. 2014

15.Endoscopic ultrasound in patients with normal liver blood tests and unexplained dilatation of common bile duct and or pancreatic duct.

Oppong KW, Mitra V, Scott J, Anderson K, Charnley RM, Bonnington S, Jaques B, White S, French JJ, Manas DM, Sen G, Nayar MK. Scand J Gastroenterol. 2014

16.Endoscopic ultrasound diagnosis of an ERCP-related portobiliary fistula.

Dawwas MF, Oppong KW, John SK, Vallance AE, French JJ, Scott J, Nayar MK. Endoscopy. 2013

17.Comparison of endoscopic ultrasound and computed tomography in the assessment of pancreatic cyst size using pathology as the gold standard.

Leeds JS, Nayar MK, Dawwas M, Scott J, Anderson K, Haugk B, Oppong KW. Pancreatology. 2013

18.Does on-site adequacy assessment by cytotechnologists improve results of EUS guided FNA of solid pancreaticobiliary lesions?

Nayar MK, Chatterjee S, Wadehra V, Cunningham J, Leeds J, Oppong K. JOP. 2013

19.Diagnostic accuracy of quantitative EUS elastography for discriminating malignant from benign solid pancreatic masses: a prospective, single-center study.

Dawwas MF, Taha H, Leeds JS, Nayar MK, Oppong KW. Gastrointest Endosc. 2012

20.Endoscopic botulinum toxin injection for the treatment of diabetic gastropathy in pancreas and islet-cell transplant patients.

Thomas MP, Wilson CH, Nayar M, Manus DM, Walker M, Shaw J, White SA. Exp Clin Transplant. 2012

21.Role of EUS/EUS-guided FNA in the management of proximal biliary strictures.

Nayar MK, Manas DM, Wadehra V, Oppong KE. Hepatogastroenterology. 2011

22.Effect of dedicated and supervised training on achieving competence in EUS-FNA of solid pancreatic lesions.

Nayar M, Joy D, Wadehra V, Oppong K. Scand J Gastroenterol. 2011

23.Endoscopic ultrasound-guided gastroenterostomy for palliative drainage of an obstructed hepaticojejunostomy loop.

Chatterjee S, Ibrahim B, Charnley RM, Scott J, Nayar M. Endoscopy. 2011

24.EUS-FNA versus biliary brushings and assessment of simultaneous performance in jaundiced patients with suspected malignant obstruction.

Oppong K, Raine D, Nayar M, Wadehra V, Ramakrishnan S, Charnley RM.

25.Autoimmune pancreatitis with multiorgan involvement. A case of pericardial involvement.

Nayar M, Charnley R, Scott J, Haugk B, Oppong K. JOP. 2009

26.The use of a mechanical lithotripsy device as an adjunct to common bile duct exploration.

Robinson SM, Al-Mukhtar A, Nayar M, White SA. Ann R Coll Surg Engl. 2009

27.Mesalazine-induced jaundice, eosonophilia, and thrombocytopenia.

Nayar M, Cunliffe W, Cross P, Oppong K. Inflamm Bowel Dis. 2008

28.TIPSS in the treatment of ectopic variceal bleeding.

Nayar M, Saravanan R, Rowlands PC, McWilliams RG, Evans J, Sutton RJ, Gilmore IT, Smart HL, Lombard MG. Hepatogastroenterology. 2006

29.Transjugular intrahepatic portosystemic stent shunt: 11 years' experience at a regional referral centre.

Saravanan R, Nayar M, Gilmore IT, Smart H, McWilliams RG, Rowlands PC, Evans J, Murphy M, Gould D, Taylor S, Sutton R, Lombard MG. Eur J Gastroenterol Hepatol. 2005

30.Pseudocystoesophagitis: esophagitis and stricture due to pancreatic pseudocyst.

Nayar MK, Leiper KL, Lombard MG. JOP. 2005

31.Enhanced Escherichia coli adherence and invasion in Crohn's disease and colon cancer.

Martin HM, Campbell BJ, Hart CA, Mpofu C, Nayar M, Singh R, Englyst H, Williams HF, Rhodes JM. Gastroenterology. 2004

32.Management of inflammatory bowel disease.

Nayar M, Rhodes JM. Postgrad Med J. 2004

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