Surgeon Almantas Maleckas MD, PhD

  • Our surgeon Almantas Maleckas is a doctor of medical science
  • The only UK General Medical Council (GMC) certified surgeon in the Baltics
  • He performed over 7.000 bariatric operations
  • A pioneer in laparoscopic surgery in the region
  • More than 15 years working experience in Sweden, Gothenburg University hospital
  • Works both in Lithuania and Sweden, speaks fluent English and Swedish
  • London School of Economics graduate

Professional education:

  • 1991 – graduated from Kaunas University of Medicine;
  • 1994 – completed a residency in general surgery at Kaunas University of Medicine;
  • 1996 – completed a residency in abdominal surgery at Kaunas University of Medicine;
  • 2000 – awarded the degree of Doctor of Medical Sciences.
  • Had residencies in Germany, Greece, Switzerland, Sweden and USA.


Dr Almantas Maleckas holds regular consultations in London, Lithuania or online by Skype. Please contact us in order to make an appointment.

First steps in the field of bariatric surgery

Dr Maleckas was trained for bariatric surgery in 2001, in Sahlgrenska University hospital, Gothenburg, Sweden. 6 years later he established an International Bariatric Training center in Kaunas Medical university Hospital, back in Lithuania. In 2007 Dr Almantas Maleckas also started learning Laparoscopic Esophageal resection and Thoracoscopic procedures in Pitsburg Medical university, USA.

Work in Sweden and Lithuania

Since 2003 Dr Almantas Maleckas has been working in Sweden Sahlgrenska hospital. He spends approximately 2 weeks of each month in Sweden. After he started regularly working in the Swedish hospital the surgeon soon became fluent in Swedish. Dr Maleckas considers working in 2 countries to be a useful experience because he can compare 2 different medical systems as well as apply best solutions in daily work from both of his jobs.

Experienced and authoritative specialist

Dr Almantas Maleckas is often invited to various International medical congresses as a special guest to give speeches and lectures. Surgeons from Poland, Slovakia, Estonia, Czech Republic and other countries are always looking forward to the arrival of the respectable surgeon to share his expert  experience in bariatric and laparoscopic surgery.

A. Maleckas scientific work, articles (co-author):​

Venclauskas L, Maleckas A, Arcelus JI. Reply to: thromboprophylaxis in the obese surgical patient. ESA VTE Guidelines Task Force. Eur J Anaesthesiol. 2019 Feb;36(2):163-164. doi: 10.1097/EJA.0000000000000937

Gradauskas A, Venclauskas L, Pažusis M, Karpavičius A, Maleckas A. Comparison of the Different Treatment Strategies for Patients with Rectus Sheath Haematoma. Medicina (Kaunas). 2018 May 30;54(3). pii: E38. doi: 10.3390/medicina54030038.

Gudaityte R, Adamonis K, Maleckas A. Laparoscopic Gastric Greater Curvature Plication: Intermediate Results and Factors Associated with Failure. Obes Surg. 2018 Dec;28(12):4087-4094. doi: 10.1007/s11695-018-3465-8.

Wallenius V, Dirinck E, Fändriks L, Maleckas A, le Roux CW, Thorell A. Glycemic Control after Sleeve Gastrectomy and Roux-En-Y Gastric Bypass in Obese Subjects with Type 2 Diabetes Mellitus. Obes Surg. 2018 Jun;28(6):1461-1472. doi: 10.1007/s11695-017-3061-3.

Venclauskas L, Maleckas A, Arcelus JI; ESA VTE Guidelines Task Force. European guidelines on perioperative venous thromboembolism prophylaxis: Surgery in the obese patient. Eur J Anaesthesiol. 2018 Feb;35(2):147-153. doi: 10.1097/EJA.0000000000000703.

Ramonienė G, Maleckienė L, Nadišauskienė RJ, Bartusevičienė E, Railaitė DR, Mačiulevičienė R, Maleckas A. Maternal obesity and obstetric outcomes in a tertiary referral center. Medicina (Kaunas). 2017;53(2):109-113. doi: 10.1016/j.medici.2017.03.003

Kupcinskiene K, Trepenaitis D, Petereit R, Kupcinskas J, Gudaityte R, Maleckas A, Macas A. Monitoring of Hypercoagulability by Thromboelastography in Bariatric Surgery. Med Sci Monit. 2017 Apr 15;23:1819-1826.

Maleckas A, Gudaitytė R, Petereit R, Venclauskas L, Veličkienė D. Weight regain after gastric bypass: etiology and treatment options. Gland Surg. 2016 Dec;5(6):617-624. doi: 10.21037/gs.2016.12.02.

Kupcinskiene K, Murnikovaite M, Varkalaite G, Juzenas S, Trepenaitis D, Petereit R, Maleckas A, Kupcinskas J, Macas A. Thrombosis Related ABO, F5, MTHFR, and FGG Gene Polymorphisms in Morbidly Obese Patients. Dis Markers. 2016;2016:7853424. doi: 10.1155/2016/7853424.

Ospanov O, Maleckas A, Orekeshova A. Gastric greater curvature plication combined with Nissen fundoplication in the treatment of gastroesophageal reflux disease and obesity. Medicina (Kaunas). 2016;52(5):283-290. doi: 10.1016/j.medici.2016.08.001.

Labrie V, Buske OJ, Oh E, Jeremian R, Ptak C, Gasiūnas G, Maleckas A, Petereit R, Žvirbliene A, Adamonis K, Kriukienė E, Koncevičius K, Gordevičius J, Nair A, Zhang A, Ebrahimi S, Oh G, Šikšnys V, Kupčinskas L, Brudno M, Petronis A. Lactase nonpersistence is directed by DNA-variation-dependent epigenetic aging. Nat Struct Mol Biol. 2016 Jun;23(6):566-73. doi: 10.1038/nsmb.3227

Abusnana S, Abdi S, Tagure B, Elbagir M, Maleckas A. Bariatric surgery outcomes: a single-center study in the United Arab Emirates. Diabetes Metab Syndr Obes. 2015 Sep 18;8:461-71. doi: 10.2147/DMSO.S87861.

Maleckas A, Venclauskas L, Wallenius V, Lönroth H, Fändriks L. Surgery in the treatment of type 2 diabetes mellitus. Scand J Surg. 2015 Mar;104(1):40-7. doi: 10.1177/1457496914561140.

Mickevicius A, Ignatavicius P, Markelis R, Parseliunas A, Butkute D, Kiudelis M, Endzinas Z, Maleckas A, Dambrauskas Z. Trends and results in treatment of gastric cancer over last two decades at single East European centre: a cohort study. BMC Surg. 2014 Nov 26;14:98. doi: 10.1186/1471-2482-14-98.

Petereit R, Jonaitis L, Kupčinskas L, Maleckas A. Gastrointestinal symptoms and eating behavior among morbidly obese patients undergoing Roux-en-Y gastric bypass. Medicina (Kaunas). 2014;50(2):118-23. doi: 10.1016/j.medici.2014.06.009.

Kiudelis M, Mechonosina K, Mickevičius A, Maleckas A, Endzinas Ž. The influence of operation technique on long-term results of achalasia treatment. Medicina (Kaunas). 2013;49(2):56-60.

Werling M, Fändriks L, Björklund P, Maleckas A, Brandberg J, Lönroth H, le Roux CW, Olbers T. Long-term results of a randomized clinical trial comparing Roux-en-Y gastric bypass with vertical banded gastroplasty. Br J Surg. 2013 Jan;100(2):222-30. doi: 10.1002/bjs.8975.

Mickevičius A, Endzinas Ž, Kiudelis M, Jonaitis L, Kupčinskas L, Pundzius J, Maleckas A. Influence of wrap length on the effectiveness of Nissen and Toupet fundoplications: 5-year results of prospective, randomized study. Surg Endosc. 2013 Mar;27(3):986-91. doi: 10.1007/s00464-012-2550-7. 

Toliusis V, Kalesinskas RJ, Kiudelis M, Maleckas A, Griksas M. Surgical treatment of metastatic tumors of the femur. Medicina (Kaunas). 2010;46(5):323-8

Laurenius A, Taha O, Maleckas A, Lönroth H, Olbers T. Laparoscopic biliopancreatic diversion/duodenal switch or laparoscopic Roux-en-Y gastric bypass for super-obesity-weight loss versus side effects. Surg Obes Relat Dis. 2010 Jul-Aug;6(4):408-14. doi: 10.1016/j.soard.2010.03.293. 

Dambrauskas Z, Parseliūnas A, Maleckas A, Gulbinas A, Barauskas G, Pundzius J. Interventional and surgical management of abdominal compartment syndrome in severe acute pancreatitis. Medicina (Kaunas). 2010;46(4):249-55.

Venclauskas L, Maleckas A, Kiudelis M. One-year follow-up after incisional hernia treatment: results of a prospective randomized study. Hernia. 2010 Dec;14(6):575-82. doi: 10.1007/s10029-010-0686-8.

Venclauskas L, Bratlie SO, Zachrisson K, Maleckas A, Pundzius J, Jönson C. Scand J Gastroenterol. Is transcatheter arterial embolization a safer alternative than surgery when endoscopic therapy fails in bleeding duodenal ulcer? 2010 Mar;45(3):299-304. doi: 10.3109/00365520903486109

Malcius D, Jonkus M, Kuprionis G, Maleckas A, Monastyreckiene E, Uktveris R, Rinkevicius S, Barauskas V. The accuracy of different imaging techniques in diagnosis of acute hematogenous osteomyelitis. Medicina (Kaunas). 2009;45(8):624-31.

Markelis R, Endzinas Z, Grižas S, Pundzius J, Saladžinskas Z, Juozaitytė E, Inčiūra A, Pranys D, Maleckas A. Early postoperative intraperitoneal chemotherapy for the treatment of advanced gastric cancer. Medicina (Kaunas). 2011;47(1):63-9.

Toliusis V, Kalesinskas RJ, Kiudelis M, Maleckas A. Surgical treatment of humeral metastatic tumors. Medicina (Kaunas). 2009;45(8):607-14.

Markelis R, Endzinas Z, Kiudelis M, Grizas S, Pundzius J, Saladzinskas Z, Juozaityte E, Inciūra A, Pranys D, Maleckas A. Adjuvant therapy after curative resection with D2 lymphadenectomy for gastric cancer: results of a prospective clinical trial. Medicina (Kaunas). 2009;45(6):460-8.

Mickevicius A, Endzinas Z, Kiudelis M, Jonaitis L, Kupcinskas L, Maleckas A, Pundzius J. Influence of wrap length on the effectiveness of Nissen and Toupet fundoplication: a prospective randomized study. Surg Endosc. 2008 Oct;22(10):2269-76. doi: 10.1007/s00464-008-9852-9.

Bogusevicius A, Grinkevicius A, Maleckas A, Pundzius J. The role of D-dimer in the diagnosis of strangulated small-bowel obstruction. Medicina (Kaunas). 2007;43(11):850-4.

Olbers T, Björkman S, Lindroos A, Maleckas A, Lönn L, Sjöström L, Lönroth H. Body composition, dietary intake, and energy expenditure after laparoscopic Roux-en-Y gastric bypass and laparoscopic vertical banded gastroplasty: a randomized clinical trial. Ann Surg. 2006 Nov;244(5):715-22.

Andrén-Sandberg A, Ansorge C, Eiriksson K, Glomsaker T, Maleckas A. Treatment of pancreatic pseudocysts. Scand J Surg. 2005;94(2):165-75.

Olbers T, Fagevik-Olsén M, Maleckas A, Lönroth H. Randomized clinical trial of laparoscopic Roux-en-Y gastric bypass versus laparoscopic vertical banded gastroplasty for obesity. Br J Surg. 2005 May;92(5):557-62.


Auskalnis S, Bogusevicius A, Maleckas A, Butrimavicius S, Toker I. Primary peritonitis caused by group A beta-hemolytic streptococcus. Medicina (Kaunas). 2004;40(10):969-74. 

Maleckas A, Daubaras V, Vaitkus V, Aniuliene A, Dirzinauskas E, Rakauskas M, Pundzius J. Increased postoperative peritoneal adhesion formation after the treatment of experimental peritonitis with chlorhexidine. Langenbecks Arch Surg. 2004 Aug;389(4):256-60. 

Barauskas G, Svagzdys S, Maleckas A. C-reactive protein in early prediction of pancreatic necrosis. Medicina (Kaunas). 2004;40(2):135-40.

Mickevicius A, Endzinas Z, Kiudelis M, Maleckas A. Hiatal hernia and gastroesophageal reflux: possibilities and results of surgical treatment. Medicina (Kaunas). 2002;38(12):1201-6.

Endzinas Z, Maleckas A, Mickevicius A, Kiudelis M. Follow-up results and learning curve in laparoscopic gastrofundoplications. Zentralbl Chir. 2002 Nov;127(11):939-43.

Bogusevicius A, Maleckas A, Pundzius J, Skaudickas D. Prospective randomised trial of computer-aided diagnosis and contrast radiography in acute small bowel obstruction. Eur J Surg. 2002;168(2):78-83.

Bogusevicius A, Pundzius J, Maleckas A, Vilkauskas L. Computer-aided diagnosis of the character of bowel obstruction. Int Surg. 1999 Jul-Sep;84(3):225-8.