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Leon Naar, M.D.

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Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
  1. Gallastegi AD, Naar L, Gaitanidis A, Gebran A, Nederpelt CJ, Parks JJ, Hwabejire JO, Fawley J, Mendoza AE, Saillant NN, Fagenholz PJ, Velmahos GC, Kaafarani HMA. Don't Forget the Platelets: The Independent Impact of RBC: PLT Ratio on Mortality in Massively Transfused Trauma Patients. J Trauma Acute Care Surg. 2022 Mar 18. PMID: 35313325.
    Citations:    Fields:    
  2. Nederpelt C, Naar L, Meier K, van Wijck S, Krijnen P, Velmahos G, Kaafarani H, Rosenthal M, Schipper I. Treatment and outcomes of anticoagulated geriatric trauma patients with traumatic intracranial hemorrhage after falls. Eur J Trauma Emerg Surg. 2022 Mar 10. PMID: 35267051.
    Citations:    Fields:    
  3. Naar L, Dorken Gallastegi A, Dowling M, Mashbari HNA, Wallace B, Bankhead-Kendall B, Beagle J, Pallotta JB, Breen K, Velmahos GC, Duggan MJ, King CDR. Chitosan-based lifefoam improves survival in lethal noncompressible abdominal bleeding in swine. Surgery. 2022 Feb 17. PMID: 35184891.
    Citations:    Fields:    
  4. Dorken Gallastegi A, Mikdad S, Kapoen C, Breen KA, Naar L, Gaitanidis A, El Hechi M, Pian-Smith M, Cooper JB, Antonelli DM, MacKenzie O, Del Carmen MG, Lillemoe KD, Kaafarani HMA. Intraoperative Deaths: Who, Why, and Can We Prevent Them? J Surg Res. 2022 Feb 15; 274:185-195. PMID: 35180495.
    Citations:    Fields:    
  5. Naar L, Dorken Gallastegi A, Kongkaewpaisan N, Kokoroskos N, Tolis G, Melnitchouk S, Villavicencio-Theoduloz M, Mendoza AE, Velmahos GC, Kaafarani HMA, Jassar AS. Risk factors for ischemic gastrointestinal complications in patients undergoing open cardiac surgical procedures: A single-center retrospective experience. J Card Surg. 2022 Apr; 37(4):808-817. PMID: 35137981.
    Citations:    Fields:    Translation:Humans
  6. El Moheb M, Christensen MA, Naar L, Gaitanidis A, Breen K, Alser O, Maurer LR, Gartland RM, Hwabejire JO, Velmahos G, Kaafarani HMA. Comment on "Gastrointestinal Complications in Critically Ill Patients With COVID-19": An Update. Ann Surg. 2021 12 01; 274(6):e821-e823. PMID: 33074881.
    Citations: 2     Fields:    Translation:HumansPHPublic Health
  7. Kwon E, Krause C, Luo-Owen X, McArthur K, Cochran-Yu M, Swentek L, Burruss S, Turay D, Krasnoff C, Grigorian A, Nahmias J, Butt A, Gutierrez A, LaRiccia A, Kincaid M, Fiorentino M, Glass N, Toscano S, Ley EJ, Lombardo S, Guillamondegui O, Bardes JM, DeLa'O C, Wydo S, Leneweaver K, Duletzke N, Nunez J, Moradian S, Posluszny J, Naar L, Kaafarani H, Kemmer H, Lieser M, Hanson I, Chang G, Bilaniuk JW, Nemeth Z, Mukherjee K. Time is domain: factors affecting primary fascial closure after trauma and non-trauma damage control laparotomy (data from the EAST SLEEP-TIME multicenter registry). Eur J Trauma Emerg Surg. 2021 Nov 29. PMID: 34845499.
    Citations:    Fields:    
  8. Krause C, Kwon E, Luo-Owen X, McArthur K, Cochran-Yu M, Swentek L, Burruss S, Turay D, Grigorian A, Nahmias J, Butt A, Gutierrez A, LaRiccia A, Kincaid M, Fiorentino MN, Glass N, Toscano S, Ley E, Lombardo SR, Guillamondegui OD, Bardes JM, DeLa'O C, Wydo SM, Leneweaver K, Duletzke NT, Nunez J, Moradian S, Posluszny J, Naar L, Kaafarani H, Kemmer H, Lieser MJ, Dorricott A, Chang G, Nemeth Z, Mukherjee K. Dexmedetomidine and paralytic exposure after damage control laparotomy: risk factors for delirium? Results from the EAST SLEEP-TIME multicenter trial. Eur J Trauma Emerg Surg. 2021 Nov 22. PMID: 34807273.
    Citations:    Fields:    
  9. Dorken Gallastegi A, Gebran A, Gaitanidis A, Naar L, Hwabejire JO, Parks J, Lee J, Kaafarani HMA, Velmahos GC, Mendoza AE. Early versus late enteral nutrition in critically ill patients receiving vasopressor support. JPEN J Parenter Enteral Nutr. 2022 01; 46(1):130-140. PMID: 34599785.
    Citations:    Fields:    
  10. Nederpelt CJ, Naar L, Krijnen P, le Cessie S, Kaafarani HMA, Huisman MV, Velmahos GC, Schipper IB. Andexanet Alfa or Prothrombin Complex Concentrate for Factor Xa Inhibitor Reversal in Acute Major Bleeding: A Systematic Review and Meta-Analysis. Crit Care Med. 2021 10 01; 49(10):e1025-e1036. PMID: 33967205.
    Citations: 2     Fields:    Translation:Humans
  11. Byerly S, Maurer LR, Mantero A, Naar L, An G, Kaafarani HMA. Machine Learning and Artificial Intelligence for Surgical Decision Making. Surg Infect (Larchmt). 2021 Aug; 22(6):626-634. PMID: 34270361.
    Citations:    Fields:    Translation:Humans
  12. Christou CD, Naar L, Kongkaewpaisan N, Tsolakidis A, Smyrnis P, Tooulias A, Tsoulfas G, Papadopoulos VN, Velmahos GC, Kaafarani HMA. Validation of the Emergency Surgery Score (ESS) in a Greek patient population: a prospective bi-institutional cohort study. Eur J Trauma Emerg Surg. 2022 Apr; 48(2):1197-1204. PMID: 34296323.
    Citations:    Fields:    
  13. Naar L, Hechi MWE, Gallastegi AD, Renne BC, Fawley J, Parks JJ, Mendoza AE, Saillant NN, Velmahos GC, Kaafarani HMA, Lee J. Intensive Care Unit Volume of Sepsis Patients Does Not Affect Mortality: Results of a Nationwide Retrospective Analysis. J Intensive Care Med. 2021 Jul 07; 8850666211024184. PMID: 34231406.
    Citations:    Fields:    
  14. McArthur K, Krause C, Kwon E, Luo-Owen X, Cochran-Yu M, Swentek L, Burruss S, Turay D, Krasnoff C, Grigorian A, Nahmias J, Butt A, Gutierrez A, LaRiccia A, Kincaid M, Fiorentino MN, Glass N, Toscano S, Ley E, Lombardo SR, Guillamondegui OD, Bardes JM, DeLa'O C, Wydo SM, Leneweaver K, Duletzke NT, Nunez J, Moradian S, Posluszny J, Naar L, Kaafarani H, Kemmer H, Lieser MJ, Dorricott A, Chang G, Nemeth Z, Mukherjee K. Trauma and nontrauma damage-control laparotomy: The difference is delirium (data from the Eastern Association for the Surgery of Trauma SLEEP-TIME multicenter trial). J Trauma Acute Care Surg. 2021 07 01; 91(1):100-107. PMID: 34144559.
    Citations:    Fields:    Translation:Humans
  15. AlSowaiegh R, Naar L, El Moheb M, Parks JJ, Fawley J, Mendoza AE, Saillant NN, Velmahos GC, Kaafarani HMA. The Emergency Surgery Score is a powerful predictor of outcomes across multiple surgical specialties: Results of a retrospective nationwide analysis. Surgery. 2021 11; 170(5):1501-1507. PMID: 34176601.
    Citations:    Fields:    Translation:Humans
  16. Mendoza AE, Raju Paul S, El Hechi M, Naar L, Nederpelt C, Mikdad S, van Erp I, Hess JM, Velmahos GC, Poznansky M, Reeves P. Deep immune profiling of whole blood to identify early immune signatures that correlate to patient outcome after major trauma. J Trauma Acute Care Surg. 2021 06 01; 90(6):959-966. PMID: 33755643.
    Citations:    Fields:    Translation:Humans
  17. Alser O, Mokhtari A, Naar L, Langeveld K, Breen KA, El Moheb M, Kapoen C, Gaitanidis A, Christensen MA, Maurer LR, Mashbari H, Bankhead-Kendall B, Parks J, Fawley J, Saillant N, Mendoza A, Paranjape C, Fagenholz P, King D, Lee J, Farhat MR, Velmahos GC, Kaafarani HMA. Multisystem outcomes and predictors of mortality in critically ill patients with COVID-19: Demographics and disease acuity matter more than comorbidities or treatment modalities. J Trauma Acute Care Surg. 2021 05 01; 90(5):880-890. PMID: 33891572.
    Citations: 2     Fields:    Translation:HumansCells
  18. Mokhtari AK, Maurer LR, Christensen MA, Moheb ME, Naar L, Alser O, Gaitanidis A, Langeveld K, Kapoen C, Breen K, Velmahos GC, Kaafarani HMA. Rhabdomyolysis in Severe COVID-19: Male Sex, High Body Mass Index, and Prone Positioning Confer High Risk. J Surg Res. 2021 10; 266:35-43. PMID: 33975028.
    Citations: 1     Fields:    Translation:HumansCells
  19. Kokoroskos N, Peponis T, Lee JM, El Hechi M, Naar L, Nederpelt C, Gaitanidis A, Mendoza AE, Saillant N, Kaafarani H, King D, Velmahos G, Fagenholz P. The Role of Transaminases in Predicting Choledocholithiasis. A Novel Predictive Composite Score Development in a Cohort of 1089 Patients Undergoing Laparoscopic Cholecystectomy. Am Surg. 2021 Mar 12; 3134821998664. PMID: 33710916.
    Citations:    Fields:    
  20. El Hechi M, Kongkaewpaisan N, Naar L, Aicher B, Diaz J, O'Meara L, Decker C, Rodriquez J, Schroeppel T, Rattan R, Vasileiou G, Yeh DD, Simonoski U, Turay D, Cullinane D, Emmert C, McCrum M, Wall N, Badach J, Goldenberg-Sandau A, Carmichael H, Velopulos C, Choron R, Sakran J, Bekdache K, Black G, Shoultz T, Chadnick Z, Sim V, Madbak F, Steadman D, Camazine M, Zielinski M, Hardman C, Walusimbi M, Kim M, Rodier S, Papadopoulos V, Tsoulfas G, Perez J, Kaafarani HMA. The Emergency Surgery Score accurately predicts the need for postdischarge respiratory and renal support after emergent laparotomies: A prospective EAST multicenter study. J Trauma Acute Care Surg. 2021 03 01; 90(3):557-564. PMID: 33507026.
    Citations:    Fields:    Translation:Humans
  21. AlSowaiegh R, Naar L, Mokhtari A, Parks JJ, Fawley J, Mendoza AE, Saillant NN, Velmahos GC, Kaafarani HMA. Does the Emergency Surgery Score predict failure to discharge the patient home? A nationwide analysis. J Trauma Acute Care Surg. 2021 03 01; 90(3):471-476. PMID: 33055577.
    Citations:    Fields:    Translation:Humans
  22. Kongkaewpaisan N, El Hechi MW, Naar L, Kaafarani HMA. Unplanned readmission after emergency laparotomy: A post hoc analysis of an EAST multicenter study. Surgery. 2021 06; 169(6):1434-1440. PMID: 33431187.
    Citations:    Fields:    Translation:Humans
  23. Gaitanidis A, Breen K, Naar L, Mikdad S, El Moheb M, Kongkaewpaisan N, El Hechi M, Kaafarani HMA. Performance of the Emergency Surgery Score (ESS) Across Different Emergency General Surgery Procedures. J Surg Res. 2021 05; 261:152-158. PMID: 33429224.
    Citations:    Fields:    Translation:Humans
  24. Alser O, Naar L, Christensen MA, Saillant N, Parks J, Mendoza A, Fagenholz P, King D, Kaafarani HMA, Velmahos GC, Fawley J. Preoperative frailty predicts postoperative outcomes in intestinal-cutaneous fistula repair. Surgery. 2021 05; 169(5):1199-1205. PMID: 33408040.
    Citations:    Fields:    Translation:Humans
  25. Naar L, El Hechi MW, van Erp IA, Mashbari HNA, Fawley J, Parks JJ, Fagenholz PJ, King DR, Mendoza AE, Velmahos GC, Kaafarani HMA, Saillant NN. Isolated rib cage fractures in the elderly: Do all patients belong to the intensive care unit? A retrospective nationwide analysis. J Trauma Acute Care Surg. 2020 12; 89(6):1039-1045. PMID: 32697447.
    Citations:    Fields:    Translation:Humans
  26. El Moheb M, Naar L, Christensen MA, Kapoen C, Maurer LR, Farhat M, Kaafarani HMA. Gastrointestinal Complications in Critically Ill Patients With and Without COVID-19. JAMA. 2020 Nov 10; 324(18):1899-1901. PMID: 32970139.
    Citations: 36     Fields:    Translation:Humans
  27. Naar L, Yeh DD, Kaafarani H. Reply: Incorporating preoperative computed tomography (CT) scan and colonoscopy in the practice of acute appendicitis patients at high risk for malignancy. Surgery. 2021 05; 169(5):1260. PMID: 33139066.
    Citations:    Fields:    Translation:Humans
  28. Naar L, Langeveld K, El Moheb M, El Hechi MW, Alser O, Kapoen C, Breen K, Christensen MA, Mokhtari A, Gaitanidis A, Maurer L, Luckhurst C, Hwabejire JO, Mashbari H, Bankhead-Kendall B, Lee J, Mendoza AE, Saillant NN, Parks J, Fawley J, King DR, Fagenholz PJ, Velmahos GC, Kaafarani HMA. Acute Kidney Injury in Critically-ill Patients With COVID-19: A Single-center Experience of 206 Consecutive Patients. Ann Surg. 2020 10; 272(4):e280-e281. PMID: 32932328.
    Citations: 2     Fields:    Translation:HumansPHPublic Health
  29. Kokoroskos N, Naar L, Peponis T, Martinez M, El Moheb M, El Hechi M, Alser O, Fuentes E, Velmahos G. Provocative Angiography, Followed by Therapeutic Interventions, in the Management of Hard-To-Diagnose Gastrointestinal Bleeding. World J Surg. 2020 09; 44(9):2944-2949. PMID: 32405731.
    Citations:    Fields:    Translation:Humans
  30. Nederpelt CJ, Naar L, Sylvester KW, Barra ME, Roberts RJ, Velmahos GC, Kaafarani HMA, Rosenthal MG, King DR. Evaluation of oral factor Xa inhibitor-associated extracranial bleeding reversal with andexanet alfa. J Thromb Haemost. 2020 10; 18(10):2532-2541. PMID: 32738161.
    Citations: 5     Fields:    Translation:Humans
  31. Savvidou OD, Koutsouradis P, Kaspiris A, Naar L, Chloros GD, Papagelopoulos PJ. Displaced olecranon fractures in the elderly: outcomes after non-operative treatment - a narrative review. EFORT Open Rev. 2020 Jul; 5(7):391-397. PMID: 32818066.
    Citations: 1     
  32. Kaafarani HMA, El Moheb M, Hwabejire JO, Naar L, Christensen MA, Breen K, Gaitanidis A, Alser O, Mashbari H, Bankhead-Kendall B, Mokhtari A, Maurer L, Kapoen C, Langeveld K, El Hechi MW, Lee J, Mendoza AE, Saillant NN, Parks J, Fawley J, King DR, Fagenholz PJ, Velmahos GC. Gastrointestinal Complications in Critically Ill Patients With COVID-19. Ann Surg. 2020 08; 272(2):e61-e62. PMID: 32675498.
    Citations: 51     Fields:    Translation:HumansCellsPHPublic Health
  33. Naar L, Kim P, Byerly S, Vasileiou G, Zhang H, Yeh DD, Kaafarani HMA. Increased risk of malignancy for patients older than 40 years with appendicitis and an appendix wider than 10 mm on computed tomography scan: A post hoc analysis of an EAST multicenter study. Surgery. 2020 10; 168(4):701-706. PMID: 32739139.
    Citations: 3     Fields:    Translation:Humans
  34. Kaafarani HMA, Moheb ME, Hwabejire JO, Naar L, Christensen MA, Breen K, Gaitanidis A, Alser O, Mashbari H, Bankhead-Kendall B, Mokhtari A, Maurer L, Kapoen C, Langeveld K, El Hechi MW, Lee J, Mendoza AE, Saillant NN, Parks J, Fawley J, King DR, Fagenholz PJ, Velmahos GC. Gastrointestinal Complications in Critically Ill Patients With COVID-19. Ann Surg. 2020 May 01. PMID: 32404678.
    Citations:    
  35. El Hechi MW, Lee JM, Naar L, El Moheb M, Kokoroskos N, Velmahos GC, Saillant NN, Kaafarani HMA, Mendoza AE. The Effect of Immunosuppression on Emergency Colectomy Outcomes: A Nationwide Retrospective Analysis. World J Surg. 2020 05; 44(5):1637-1647. PMID: 31925522.
    Citations: 1     Fields:    Translation:HumansPHPublic Health
  36. Naar L, Hatzaras I. Liver Resection for Hepatocellular Carcinoma and the Barcelona Clinic Liver Cancer Criteria: Is It Time to Push the Limits? Ann Surg Oncol. 2020 Jul; 27(7):2122-2124. PMID: 32297086.
    Citations: 1     Fields:    Translation:Humans
  37. Mastoraki A, Schizas D, Charalampakis N, Naar L, Ioannidi M, Tsilimigras D, Sotiropoulou M, Moris D, Vassiliu P, Felekouras E. Contribution of Histone Deacetylases in Prognosis and Therapeutic Management of Cholangiocarcinoma. Mol Diagn Ther. 2020 04; 24(2):175-184. PMID: 32125662.
    Citations: 3     Fields:    Translation:Humans
  38. Kokoroskos N, Peponis T, Lee JM, El Hechi M, Naar L, Elahad JA, Nederpelt C, Bonde A, Meier K, Mendoza A, King D, Fagenholz P, Kaafarani H, Velmahos G, Saillant N. Gallbladder wall thickness as a predictor of intraoperative events during laparoscopic cholecystectomy: A prospective study of 1089 patients. Am J Surg. 2020 10; 220(4):1031-1037. PMID: 32178838.
    Citations:    Fields:    Translation:Humans
  39. Naar L, El Hechi M, Kokoroskos N, Parks J, Fawley J, Mendoza AE, Saillant N, Velmahos GC, Kaafarani HMA. Can the Emergency Surgery Score (ESS) predict outcomes in emergency general surgery patients with missing data elements? A nationwide analysis. Am J Surg. 2020 12; 220(6):1613-1622. PMID: 32102760.
    Citations: 3     Fields:    Translation:HumansPHPublic Health
  40. Mastoraki A, Schizas D, Giannakas T, Papadopoulos PP, Naar L, Vergadis C, Anastasiou I, Vassiliu P, Pikoulis E, Liakakos T. Primary Angiosarcoma of the Kidney: Literature Review of a Rare Nosologic Entity. Anticancer Res. 2020 Feb; 40(2):625-633. PMID: 32014903.
    Citations:    Fields:    Translation:Humans
  41. Schizas D, Mastoraki A, Naar L, Tsilimigras DI, Katsaros I, Fragkiadaki V, Karachaliou GS, Arkadopoulos N, Liakakos T, Moris D. Histone Deacetylases (HDACs) in Gastric Cancer: An Update of their Emerging Prognostic and Therapeutic Role. Curr Med Chem. 2020; 27(36):6099-6111. PMID: 31309879.
    Citations: 7     Fields:    Translation:HumansCells
  42. Mastoraki A, Schizas D, Vergadis C, Naar L, Strimpakos A, Vailas MG, Hasemaki N, Agrogiannis G, Liakakos T, Arkadopoulos N. Recurrent aggressive mesenteric desmoid tumor successfully treated with sorafenib: A case report and literature review. World J Clin Oncol. 2019 Apr 24; 10(4):183-191. PMID: 31114750.
    Citations: 3     
  43. Naar L, Spanomichou DA, Vassiliu P. Comment on "Muscle wasting and survival following pre-operative chemoradiotherapy for locally advanced rectal carcinoma". Clin Nutr. 2019 04; 38(2):962-963. PMID: 30827723.
    Citations:    Fields:    Translation:Humans
  44. Schizas D, Mastoraki A, Naar L, Spartalis E, Tsilimigras DI, Karachaliou GS, Bagias G, Moris D. Concept of histone deacetylases in cancer: Reflections on esophageal carcinogenesis and treatment. World J Gastroenterol. 2018 Nov 07; 24(41):4635-4642. PMID: 30416311.
    Citations: 10     Fields:    Translation:HumansCells
  45. Naar L, Spanomichou DA, Mastoraki A, Smyrniotis V, Arkadopoulos N. Solid Pseudopapillary Neoplasms of the Pancreas: A Surgical and Genetic Enigma. World J Surg. 2017 07; 41(7):1871-1881. PMID: 28251269.
    Citations: 15     Fields:    Translation:HumansCells
  46. Oikonomou E, Vogiatzi G, Papamikroulis GA, Naar L, Siasos G, Mourouzis K, Zografos T, Vavuranakis M, Antonopoulos A, Tousoulis D. Antiplatelet Therapy in Acute Coronary Syndromes. Evidence Based Medicine. Curr Pharm Des. 2016; 22(29):4519-4536. PMID: 27319947.
    Citations: 1     Fields:    Translation:HumansCells
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Funded by the NIH National Center for Advancing Translational Sciences through its Clinical and Translational Science Awards Program, grant number UL1TR002541.