Sergio E. Sastriques, MD

Sergio
E.
Sastriques
MD
Assistant Professor of Surgery
Department of Vascular Surgery

Dr. Sastriques joined our surgical faculty as Assistant Professor of Surgery after completing the Integrated Vascular Surgery Residency at Eastern Virginia Medical School in Norfolk, VA, in 2025. His clinical areas of expertise include a focus on chronic venous insufficiency, pelvic venous disorders, deep venous reconstructions, hemodialysis access, abdominal aortic aneurysms, carotid disease, and peripheral arterial disease.

Research
Dr. Sastriques’s research interests center on venous disease, particularly pelvic venous disorders and complex deep venous reconstructions, as well as vascular biology in abdominal aortic aneurysms and other arterial conditions. His work also reflects a broader interest in understanding vascular disease within the context of overall human health. He is committed to exploring strategies that not only treat specific vascular pathologies, but also help patients optimize their health and longevity, supporting them in leading fulfilling and active lives.

Included among his recent publications are:

“Ketosis prevents abdominal aortic aneurysm rupture through C-C chemokine receptor type 2 downregulation and enhanced extracellular matrix balance,” Scientific Reports 2024.

"CCR2 Positron Emission Tomography for the Assessment of Abdominal Aortic Aneurysm Inflammation and Rupture Prediction," Cardiovascular Imaging 2020.

"Sauna use as a novel management approach for cardiovascular health and peripheral arterial disease," Frontiers in Cardiovascular Medicine 2025.

See Dr. Sastriques’s publications on PubMed.

Memberships, Awards and Honors
Argentine College for Venous and Lymphatic Surgery 
Argentine Association of Surgery
Society for Vascular Surgery
American Venous Forum
Society for Clinical Vascular Surgeons

Dr. Sastriques graduated first in his class (Rank 1/96, Medalist) from the Army School of Officers, National Military College, Buenos Aires, Argentina. 2008

Education
MD – National University of Cordoba, Faculty of Medical Sciences, Cordoba, Argentina. 2001 - 2007
General Surgery Residency – University of Buenos Aires, Central Military Hospital, Buenos Aires, Argentina. 2008 - 2013
Vascular Surgery Fellowship - University of Buenos Aires, Hospital de Clinicas, Buenos Aires, Argentina. 2014 – 2016
Vascular Surgery Research Scholar – Washington University School of Medicine, St. Louis, MO. 2017 – 2020
Integrated Vascular Surgery Residency – Eastern Virginia Medical School, Norfolk, VA. 2020 - 2025

Norbert A. M. Hootsmans, MD, MPH

Norbert
A. M.
Hootsmans
MD, MPH
Assistant Professor of Surgery, Division of General Surgery
Department of Surgery

Dr. Hootsmans joined our surgical faculty as Assistant Professor of Surgery after completing the Advanced Gastrointestinal Minimally Invasive Surgery Fellowship at Vanderbilt University Medical Center in 2025. His clinical areas of expertise include a focus on minimally invasive surgery, robotic surgery, gastroesophageal reflux disease, hiatal and paraesophageal hernias, and abdominal wall reconstruction, hernia (inguinal, ventral, incisional, flank, parastomal), and biliary disease.

Research
Dr. Hootsmans’s research interests are focused on outcomes in minimally invasive foregut and hernia/complex abdominal wall surgery, mesh use in hernia repair, enhanced recovery after surgery, quality improvement and surgical innovation.

Included among his recent publications are:  “A Randomized Trial of Three Routes of Tranexamic Acid Administration in Total Knee Arthroplasty,” Orthopedics 2023, and “Outcomes of an enhanced recovery after surgery (ERAS) program to limit perioperative opioid use in outpatient minimally invasive GI and hernia surgeries,” Surgical Endoscopy 2023.

See Dr. Hootsmans’s publications on PubMed.

Memberships, Awards and Honors
American Board of Surgery, General Surgery – Board Certified
Society of American Gastrointestinal and Endoscopic Surgeons (SAGES)
The Society for Surgery of the Alimentary Tract (SSAT)
American College of Surgeons
Resident Excellence in Teaching Award, 2024
Adrian Park Humanism Award, 2024

Education
M.P.H – Yale School of Public Health, New Haven, CT. 2013 – 2015
M.D. – Frank H. Netter, MD School of Medicine at Quinnipiac University, North Haven, CT. 2015 - 2019
Internship – Luminis Health Anne Arundel Medical Center, Annapolis, MD. 2019 – 2020
Residency – Luminis Health Anne Arundel Medical Center, Annapolis, MD. 2020 – 2024
Fellowship – Advanced Gastrointestinal Minimally Invasive Surgery Fellowship, Vanderbilt University Medical Center, Nashville, TN. 2024-2025

Leigh Anne Dageforde, MD, MPH

Leigh
Anne
Dageforde
MD, MPH
Associate Professor of Surgery, Division of Kidney & Pancreas Transplantation
Department of Surgery

Dr. Dageforde joins our faculty as Associate Professor of Surgery after being an abdominal transplant surgeon and the surgical director of living kidney donation at Massachusetts General Hospital in Boston, MA. She is excited to return to Nashville and the Vanderbilt community having completed her medical school and general surgery residency at VUMC. Her clinical interests focus on end stage kidney disease, laparoscopic and robotic living kidney donor surgery, and kidney and pancreas transplantation. She is the surgical director of living kidney donation at Vanderbilt Transplant Center.

Research
Dr. Dageforde’s research interests include conducting implementation science research related to developing and implementing interventions for post-transplant patients. Her NIH funded research addresses a critical gap in care for liver transplant recipients with alcohol use disorder through testing an integrated interventional approach with the potential to improve access, equity, and long-term outcomes for these patients. Her research also includes work on wellness after transplantation with a particular focus on maintaining a healthy weight and lifestyle.

See Dr. Dageforde’s publications on PubMed.

Memberships, Awards and Honors
Member of the American Board of Surgery in General Surgery
Anne Klibanski Visiting Scholar Award for the Mass General Hospital Center for Faculty Development – 2020
Vanguard Award with the American Society of Transplant Surgeons for the best clinical research manuscript published the previous year – 2022
Claflin Distinguished Scholar Award for the Mass General Hospital Executive Committee on Research and Office for Women’s Careers – 2024

Education
M.D. – Vanderbilt University School of Medicine, Nashville, TN. 2004 - 2008
Internship – Vanderbilt University Medical Center, Nashville, TN. 2008 – 2009
Residency – Vanderbilt University Medical Center, Nashville, TN. 2008 - 2016
M.P.H. – Vanderbilt University School of Medicine, Nashville, TN. 2011 - 2013
Fellowship – Washington University, St. Louis, MO. 2016 - 2018

Lina Hyun-Joo Lim, DDS

Lina
Hyun-Joo
Lim
DDS
Assistant Professor of Clinical Oral and Maxillofacial Surgery
Department of Oral and Maxillofacial Surgery

Dr. Lim joined our surgical faculty as Assistant Professor of Clinical Oral and Maxillofacial Surgery after completing her post-graduate training in Pediatric Dentistry at the University of Pittsburgh Medical Center in Pittsburgh, PA. Her clinical areas of expertise include a focus on pediatric preventative and restorative dentistry, pediatric oral surgery, special needs dentistry, and sedation dentistry.  

Memberships, Awards and Honors
Canadian Academy of Pediatric Dentistry (CAPD) Dr. Norman Levine Undergraduate Dental Student Award
Dr Cal Waddell-Western Canada Dental Society Memorial Scholarship 
The Advico Dentistry Leadership Award
American Dental Association  
American Academy of Pediatric Dentistry

Education
DDS – University of Alberta, Edmonton, Alberta, Canada. 2019 - 2023
Residency – University of Pittsburgh Medical Center, Children’s Hospital of Pittsburgh, Pittsburgh, PA. 2023-2024
 

John K. Ewing, MD

John
K.
Ewing
MD
Assistant Professor of Surgery
Division of General Surgery
Phone
(615) 343-5613
Fax
(615) 343-9485
Medical Center North (MCN)
Division of General Surgery
1161 21st Avenue
Room / Suite
D-5203
Nashville
Tennessee
37232

Dr. Ewing’s research interests are focused on optimizing patient outcomes for hernia repair including quality of life, enhanced recovery after surgery (ERAS) for hernia patients and minimally invasive techniques for hernia repair. Included among his recent publications are: “Development of an Enhanced Recovery After Surgery Program in Ventral Hernia,” The American Surgeon 2024.

See Dr. Ewing’s publications on PubMed.

john.k.ewing.2@vumc.org

Dr. Ewing joined our surgical faculty as Assistant Professor of Surgery after completing the Complex Gastrointestinal and Minimally Invasive Surgery Fellowship at the Atrium Health Carolinas Medical Center in Charlotte, N.C. His clinical areas of expertise include a focus on abdominal wall reconstruction, hernias, biliary disease and gastroesophageal reflux disease.

Memberships, Awards and Honors
American Board of Surgery, General Surgery – Board Certified
American College of Surgeons
American Hernia Society
Society of American Gastrointestinal and Endoscopic Surgeons
2024 John L. Tarpley Chief Resident Award for Clinical Excellence – Vanderbilt University Medical Center

Education
MD – Vanderbilt University School of Medicine, Nashville. 2015-2019
Residency – Vanderbilt University Medical Center, Nashville. 2019-2024
Fellowship – Complex Gastrointestinal and Minimally Invasive Surgery Fellowship, Atrium Health Carolinas Medical Center, Charlotte, N.C. 2024 - 2025

Sean H. Jonson, MD, ML

Sean
H.
Johnson
MD, ML
Assistant Professor of Surgery
Division of Surgical Oncology & Endocrine Surgery

Memberships, Awards and Honors
Dr. Johnson is currently an active member of the American Association of Endocrine Surgeons and the American College of Surgeons.

Education
MD – University of Pennsylvania, Philadelphia, 2015-2019
ML – University of Pennsylvania, Philadelphia, 2015-2019
Internship – Icahn School of Medicine at Mount Sinai, New York, N.Y. 2019-2020
Residency – Icahn School of Medicine at Mount Sinai, New York, N.Y. 2020-2024
Fellowship – Duke University, Durham, N.C. 2024-2025

Phone
(615) 322-2391
Fax
(615) 936-6535
Clinic Phone
(615) 936-8422
Preston Research Building
2220 Pierce Avenue
Room / Suite
597
Nashville
Tennessee
37232

Dr. Johnson’s research interests are in pre- and post-operatively identifying patients at risk of adrenal insufficiency following adrenalectomy and using this information to optimize enhanced recovery pathways after adrenalectomy. Included among his recent publications in numerous peer-reviewed journals are: “Cosyntropin Stimulation Testing is More Selective than Postoperative Day 1 Basal Cortisol for Diagnosing Secondary Adrenal Insufficiency After Unilateral,” Annals of Surgical Oncology 2024, and “Author Reflections: Continued Refinement of Perioperative Protocols to Predict Secondary Adrenal Insufficiency After Unilateral Adrenalectomy”, Annals of Surgical Oncology 2024.

See Dr. Johnson’s publications on PubMed

Bayard R. Wilson, MD

Bayard
R.
Wilson
MD
Assistant Professor of Neurological Surgery
Department of Neurological Surgery
bayard.wilson@vumc.org

Dr. Wilson joined our surgical faculty as Assistant Professor of Neurological Surgery after recently completing his fellowship at Rush University Medical Center in Chicago, IL. His areas of clinical expertise focuses on neurological spine surgery, comprehensive spine surgery, and tumors of the spine and spinal cord.

Research
Dr. Wilson's research focuses primarily on the effects of neuromodulation - specifically spinal cord stimulation - for patients with spinal cord injury (SCI). While in residency at UCLA, Dr. Wilson worked in Dr. Daniel Lu's Neuroplasticity and Repair Lab examining the benefits of electrical stimulation in specific SCI patient sub-populations. He plans to continue this work at Vanderbilt, partnering with the department of physical medicine and rehabilitation to assist patients in their recovery following injury.

Dr. Wilson also maintains a research interest in surgical outcomes following spine surgery of various types, geared towards improving the quality of care of all patients undergoing spine surgery.

Included among his recent publications in numerous peer-reviewed journals are: “Augmented Reality in Spinal Surgery,” Neurosurgery 2025, “Machine Learning Predicts Cerebral Vasospasm in Patients with Subarachnoid Haemorrhage” eBioMedicine 2024, and “A Survey of Physician Perspectives Toward Giloblastoma Resection,” World Neurosurgery 2024.

See Dr. Wilson’s publications on PubMed.

Memberships, Awards and Honors
Dr. Wilson received the California Association of Neurological Surgeons Top Clinical Abstract Award in 2020 during his residency at the University of California, Los Angeles.

Education
Dr. Lee earned his Master’s in Advanced Studies (clinical research) and medical degree from the University of California in San Diego, CA. He then completed his residency in the Department of Neurosurgery at the University of California in Los Angeles, CA.

John Stokes, IV, MD

John
Stokes
IV, MD
Assistant Professor of Thoracic Surgery
Department of Thoracic Surgery
john.w.stokes@vumc.org

Kristina Shaffer, MD

Kristina
Shaffer
Associate Professor of Surgery
Division of Surgical Oncology
Kristina.shaffer@vumc.org