Lygia Stewart, MD
Professor
Surgery
School of Medicine

Education & Training

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• Diversity, Equity, and Inclusion Champion Training University of California 2018
• Clinical Fellowship University of California, San Francisco

Publications (43)

Top publication keywords:
Intestinal ObstructionGallstonesObesity, MorbidBiliary TractCholecystectomy, LaparoscopicIatrogenic DiseaseForeign BodiesPancreaticoduodenectomyDigestive System Surgical ProceduresForeign-Body MigrationGastric BypassMedical ErrorsBiliary Tract DiseasesGeneral SurgeryNutritional Sciences

• Alteration in the gut microbiome is associated with changes in bone metabolism after laparoscopic sleeve gastrectomy.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2024 Wu KC, McCauley KE, Lynch SV, Nayak RR, King NJ, Patel S, Kim TY, Condra K, Fadrosh D, Nguyen D, Lin DL, Lynch K, Rogers SJ, Carter JT, Posselt AM, Stewart L, Schafer AL
• Intestinal Calcium Absorption Decreases After Laparoscopic Sleeve Gastrectomy Despite Optimization of Vitamin D Status.
  The Journal of clinical endocrinology and metabolism 2023 Wu KC, Cao S, Weaver CM, King NJ, Patel S, Kim TY, Black DM, Kingman H, Shafer MM, Rogers SJ, Stewart L, Carter JT, Posselt AM, Schafer AL
• Prebiotic to Improve Calcium Absorption in Postmenopausal Women After Gastric Bypass: A Randomized Controlled Trial.
  The Journal of clinical endocrinology and metabolism 2022 Wu KC, Cao S, Weaver CM, King NJ, Patel S, Kingman H, Sellmeyer DE, McCauley K, Li D, Lynch SV, Kim TY, Black DM, Shafer MM, Özçam M, Lin DL, Rogers SJ, Stewart L, Carter JT, Posselt AM, Schafer AL
• Mesh on the move: a case report of total transmural surgical mesh migration causing bowel obstruction.
  Clinical journal of gastroenterology 2020 Leach JR, Manoukian B, Stewart L
• Ampullary stenosis and choledocholithiasis post Roux-En-Y gastric bypass: challenges of biliary access and intervention.
  HPB : the official journal of the International Hepato Pancreato Biliary Association 2020 Wisneski AD, Carter J, Nakakura EK, Posselt A, Rogers SJ, Cello JP, Arain M, Kirkwood KS, Hirose K, Stewart L, Corvera CU

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• Hyponatremia is associated with more severe biliary disease.
  World journal of gastrointestinal surgery 2020 Zobel MJ, Stewart L
• Increases in PYY and uncoupling of bone turnover are associated with loss of bone mass after gastric bypass surgery.
  Bone 2019 Kim TY, Shoback DM, Black DM, Rogers SJ, Stewart L, Carter JT, Posselt AM, King NJ, Schafer AL
• Roux-en-Y gastric bypass is a safe and effective option that improves major Co-Morbidities associated with obesity in an older, veteran population.
  American journal of surgery 2019 Lyo V, Schafer AL, Stewart L
• Changes in Lean Mass, Absolute and Relative Muscle Strength, and Physical Performance After Gastric Bypass Surgery.
  The Journal of clinical endocrinology and metabolism 2019 Alba DL, Wu L, Cawthon PM, Mulligan K, Lang T, Patel S, King NJ, Carter JT, Rogers SJ, Posselt AM, Stewart L, Shoback DM, Schafer AL
• Patient Co-Morbidity and Functional Status Influence the Occurrence of Hospital Acquired Conditions More Strongly than Hospital Factors.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2018 Moghadamyeghaneh Z, Stamos MJ, Stewart L
• Minimal-invasive approach to pancreatoduodenectomy is associated with lower early postoperative morbidity.
  American journal of surgery 2018 Moghadamyeghaneh Z, Sleeman D, Stewart L
• Effects of Gastric Bypass Surgery on Bone Mass and Microarchitecture Occur Early and Particularly Impact Postmenopausal Women.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2018 Schafer AL, Kazakia GJ, Vittinghoff E, Stewart L, Rogers SJ, Kim TY, Carter JT, Posselt AM, Pasco C, Shoback DM, Black DM
• Bone Marrow Fat Changes After Gastric Bypass Surgery Are Associated With Loss of Bone Mass.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2017 Kim TY, Schwartz AV, Li X, Xu K, Black DM, Petrenko DM, Stewart L, Rogers SJ, Posselt AM, Carter JT, Shoback DM, Schafer AL
• Intestinal Calcium Absorption Decreases Dramatically After Gastric Bypass Surgery Despite Optimization of Vitamin D Status.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2015 Schafer AL, Weaver CM, Black DM, Wheeler AL, Chang H, Szefc GV, Stewart L, Rogers SJ, Carter JT, Posselt AM, Shoback DM, Sellmeyer DE
• Distractions during resident handoffs: incidence, sources, and influence on handoff quality and effectiveness.
  JAMA surgery 2015 Anderson CE, Nicksa GA, Stewart L
• Innovative approach using interprofessional simulation to educate surgical residents in technical and nontechnical skills in high-risk clinical scenarios.
  JAMA surgery 2015 Nicksa GA, Anderson C, Fidler R, Stewart L
• Importance of nutrition visits after gastric bypass surgery for American veterans, San Francisco, 2004-2010.
  Preventing chronic disease 2014 Win AZ, Ceresa C, Schafer AL, Mak P, Stewart L
• Iatrogenic biliary injuries: identification, classification, and management.
  The Surgical clinics of North America 2014 Stewart L
• The association between body mass index and severe biliary infections: a multivariate analysis.
  American journal of surgery 2012 Stewart L, Griffiss JM, Jarvis GA, Way LW
• Laparoscopic treatment of liver tumours using a two-needle probe bipolar radiofrequency ablation device.
  HPB : the official journal of the International Hepato Pancreato Biliary Association 2011 Alemi F, Kwon E, Chiu J, Aoki H, Stewart L, Corvera CU
• Yield and performance characteristics of endoscopic ultrasound-guided fine needle aspiration for diagnosing upper GI tract stromal tumors.
  Digestive diseases and sciences 2011 Watson RR, Binmoeller KF, Hamerski CM, Shergill AK, Shaw RE, Jaffee IM, Stewart L, Shah JN
• Bringing the skills laboratory home: an affordable webcam-based personal trainer for developing laparoscopic skills.
  Journal of surgical education 2010 Kobayashi SA, Jamshidi R, O'Sullivan P, Palmer B, Hirose S, Stewart L, Kim EH
• Hepatic surgery at a VA tertiary medical center: lessons learned.
  American journal of surgery 2010 Alemi F, Kwon E, Freise C, Kang SM, Hirose R, Stewart L, Corvera CU
• Operative reports: form and function.
  Archives of surgery (Chicago, Ill. : 1960) 2010 Stewart L, Hunter JG, Wetter A, Chin B, Way LW
• The efficacy of medical team training: improved team performance and decreased operating room delays: a detailed analysis of 4863 cases.
  Annals of surgery 2010 Wolf FA, Way LW, Stewart L
• Laparoscopic bile duct injuries: timing of surgical repair does not influence success rate. A multivariate analysis of factors influencing surgical outcomes.
  HPB : the official journal of the International Hepato Pancreato Biliary Association 2009 Stewart L, Way LW
• Neuroendocrine tumors of the ampulla of Vater: biological behavior and surgical management.
  Archives of surgery (Chicago, Ill. : 1960) 2009 Carter JT, Grenert JP, Rubenstein L, Stewart L, Way LW
• Tumors of the ampulla of vater: histopathologic classification and predictors of survival.
  Journal of the American College of Surgeons 2008 Carter JT, Grenert JP, Rubenstein L, Stewart L, Way LW
• Implementation of a multidisciplinary treatment team for hepatocellular cancer at a Veterans Affairs Medical Center improves survival.
  HPB : the official journal of the International Hepato Pancreato Biliary Association 2008 Chang TT, Sawhney R, Monto A, Davoren JB, Kirkland JG, Stewart L, Corvera CU
• Elderly patients have more severe biliary infections: influence of complement-killing and induction of TNFalpha production.
  Surgery 2007 Stewart L, Grifiss JM, Jarvis GA, Way LW
• Bacteria entombed in the center of cholesterol gallstones induce fewer infectious manifestations than bacteria in the matrix of pigment stones.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2007 Stewart L, Griffiss JM, Jarvis GA, Way LW
• Endoscopic treatment of Boerhaave syndrome using a removable self-expandable plastic stent.
  Journal of clinical gastroenterology 2007 Ghassemi KF, Rodriguez HJ, Vesga L, Stewart L, McQuaid KR, Shah JN
• Gallstones containing bacteria are biofilms: bacterial slime production and ability to form pigment solids determines infection severity and bacteremia.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2007 Stewart L, Griffiss JM, Jarvis GA, Way LW
• Biliary bacterial factors determine the path of gallstone formation.
  American journal of surgery 2006 Stewart L, Grifiss JM, Jarvis GA, Way LW
• Bipolar pulse coagulation for resection of the cirrhotic liver.
  The Journal of surgical research 2006 Corvera CU, Dada SA, Kirkland JG, Garrett RD, Way LW, Stewart L
• Local resection of ampullary tumors.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2005 Meneghetti AT, Safadi B, Stewart L, Way LW
• Spectrum of gallstone disease in the veterans population.
  American journal of surgery 2005 Stewart L, Griffiss JM, Way LW
• Right hepatic artery injury associated with laparoscopic bile duct injury: incidence, mechanism, and consequences.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2004 Stewart L, Robinson TN, Lee CM, Liu K, Whang K, Way LW
• Causes and prevention of laparoscopic bile duct injuries: analysis of 252 cases from a human factors and cognitive psychology perspective.
  Annals of surgery 2003 Way LW, Stewart L, Gantert W, Liu K, Lee CM, Whang K, Hunter JG
• Cholangitis: bacterial virulence factors that facilitate cholangiovenous reflux and tumor necrosis factor-alpha production.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2003 Stewart L, Oesterle AL, Grifiss JM, Jarvis GA, Way LW
• Pathogenesis of pigment gallstones in Western societies: the central role of bacteria.
  Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract 2002 Stewart L, Oesterle AL, Erdan I, Griffiss JM, Way LW
• Gram-negative bacteria killed by complement are associated with more severe biliary infections and produce more tumor necrosis factor-alpha in sera.
  Surgery 2002 Stewart L, Oesterle AL, Griffiss JM, Jarvis GA, Aagaard B, Way LW
• Patch testing to cosmetics and topical drugs.
  American journal of contact dermatitis : official journal of the American Contact Dermatitis Society 1996 Stewart LA