Colon Expert Witnesses

Windermere, Florida

Oncology, Hematology - cutaneous malignancies, gastrointestinal malignancies, melanoma, skin cancers, merkel cell, gastric, esophageal, liver, pancreas, colon, rectal, small bowel, neuroendocrine tumors, adenocarcinoma, soft tissue sarcoma, bone sarcoma, anal, abdominal, immunotherapy, chemotherapy

Samuel S. Thomas, MD Triple Board-Certified Medical Oncologist & Hematologist Windermere, Florida | Phone: (954) 663-7551 | Website: www.medoncmd.com Expert Witness Profile Dr. Sajeve Thomas is a triple board-certified (Internal Medicine, Hematology, Medical Oncology) medical oncologist with over 14 years of active clinical practice and more than 100 expert witness case reviews. He provides expert consultation for both plaintiff and defense in oncology-related malpractice claims, with specific expertise in cutaneous, gastrointestinal, and soft tissue malignancies. Dr. Thomas is known for his ability to clearly explain complex medical issues to juries, backed by balanced litigation experience, academic involvement, and ongoing clinical practice at a major cancer center. Areas of Expertise Delayed or missed cancer diagnosis Chemotherapy and immunotherapy complications Causation and prognosis in metastatic disease Standard of care reviews (SOC) Oncology adverse events & treatment dev...

Fort Myers, Florida

General Surgery, Bariatric Surgery - Endoscopy, Hernia, Gastrointestinal, Solid Organ, Postoperative Care, Colonoscopy, Colon, Weight Loss, Acid reflux, Hiatal Hernia, Upper GI, Swallowing Disorders, Robotic Surgery, Wound Care, Stomach Surgery, Hiatal Hernia, Bariatric Surgery, Endoscopic Sleeve, Gastric Bypass, Bowel Injury

Dr. Siegal is a board-certified fellow of the American College of Surgeons with specialty training in minimally invasive bariatric, robotic, and endoscopic surgery. He graduated from the University of Miami in 2008, then received his medical degree from the University of Florida in 2013. Dr. Siegal then pursued his general surgery residency at the Oregon Health and Science University in Portland, OR where he published many peer-reviewed research papers focused on hernia surgery, esophageal cancer, and reflux disease. He then completed a fellowship in advanced robotic gastrointestinal, endoscopic and bariatric surgery at Penn State University where he focused on advanced surgical endoscopy including Endoscopic Sleeve Gastroplasty and the TORe procedure. Dr. Siegal is an Adjunct Professor Nova Southeastern University and was a previous Instructor of Surgery at Penn State University. In addition to being a Founding Member of the American Foregut Society, Dr. Siegal carries the follo...

Loxahatchee Groves, Florida

General Surgery, Bariatric Surgery - Bariatric Surgery, Weight Loss Surgery, Hernia, Gallbladder, Mesh, Lap Band, Colon, Intestine, Breast Surgery, General Surgery, Sleeve, Gastric Bypass, Abdominal Surgery, Surgical Infection

Dr. Larson is a board-certified general surgeon with an active clinical practice in south Florida since 2004. He has a subspecialty interest in bariatric surgery and regularly performs over 500 general surgery procedures annually in addition to over 125 bariatric (weight loss) surgery procedures annually. Dr. Larson is the medical director for a nationally recognized center of excellence in bariatric surgery and maintains a faculty appointment with the University of Miami. He has been reviewing medicolegal cases since 2008 and has recent and ongoing experience with case reviews, affidavits, depositions, and trial testimony.

Kensington, Maryland

Pathology - Gastrointestinal Pathology, Liver Pathology, Hopkins, Surgical pathology, Board Certified, Cancer, inflammatory bowel disease, hepatocellular carcinoma, dysplasia, Barrett esophagus, perforation, colon, adhesions, gastric cancer, esophagus, anal cancer, anus

Dr. Lysandra Voltaggio is a nationally recognized gastrointestinal and liver pathologist with nearly 11 years of faculty experience at Johns Hopkins in the Division of GI and Liver Pathology. She is board-certified in Anatomic, Clinical, and Cytopathology, and currently serves as Staff Pathologist at The Joint Pathology Center and Adjunct Associate Professor at Johns Hopkins School of Medicine. Dr. Voltaggio has testified at trial and in deposition 11 times for both plaintiffs and defense attorneys. She is known for producing clear, well-reasoned expert reports and delivering unbiased, professional testimony. Attorneys consistently rely on her ability to explain complex pathology in logical, accessible terms that resonate with judges and juries. Her clinical expertise includes neoplastic and inflammatory diseases of the GI tract and liver, and she regularly provides second opinions on challenging cases nationwide. With a reputation for precision, objectivity, and collegiality, Dr....

Ipswich, Massachusetts

Medical Devices, Engineering - Stent, Septal Occluder, Medical Devices, Vena Cava, Filter, heart, brain, colon, valve, mitral, aortic, finite element, FEA, AAA, disposables, nitinol, percutaneous, aneurysm , failure analysis, surgical instrument

Saginaw, Michigan

General Surgery, Critical Care Surgery - Trauma surgery, Personal Injury, Traumatic Injuries, Medical Malpractice, Critical Care, Intensive Care, Motor vehicle collision, Abdominal surgery, Surgical complications, Traumatic Brain Injury, Sepsis, Shock, Spinal Cord Injury, Abdominal pain, Gallbladder, Appendix, Intestines, Colon, Wounds

Dual board-certified in general surgery and surgical critical care. Active clinical practice with a decade of experience. Fellowship-trained trauma surgeon. Trauma Medical Director and Department of Surgery Chair of ACS-verified Level II Trauma Center. Active clinical practice includes elective general surgery, emergency general surgery, trauma surgery, and critical care. Associate Professor of Surgery - Trauma and Surgical Critical Care. Course Director for Advanced Trauma Life Support. Experienced healthcare speaker with presentations at national medical conferences. Active clinical practice includes the following: -Elective general surgery (examples: gallbladder removal, hernia repair) -Emergency general surgery (examples: appendicitis, bowel perforation, bowel obstruction, internal bleeding) -Trauma surgery (examples: motor vehicle collisions, gunshot wounds, stab wounds, falls) -Critical care (examples: head injury, respiratory failure, need for intensive care)

Flowood, Mississippi

Pediatric Gastroenterology - Abdominal Endoscopy, Colonoscopy, Liver, Reflux, Gastritis, Intestine, Abdominal Pain, Liver Disease, Colon, Failure to Thrive, Vomiting, Small Intestine, Constipation, Diarrhea

Rochester, New York

Pathology - Gastrointestinal, GI, Liver, Pancreas, Biliary, Frozen section, colon, stomach, intestine, bowel, biopsy, IBD, inflammatory bowel disease, rectum, anus, dysplasia, hepatitis, pancreas, colitis

Associate Director of Surgical Pathology (2025-present) and Director of Gastrointestinal Pathology (2021-present) at the University of Rochester Medical Center. Fellowship trained and clinically active in Gastrointestinal, Liver, and Pancreas pathology, and also clinically practice frozen section diagnosis and cardiac pathology. I have published peer-reviewed articles on a variety of topics in gastrointestinal and liver pathology including pancreatic adenocarcinoma, liver biopsy diagnosis, esophagitis, and colitis. I also have presented and moderated educational and research sessions on GI, liver, and general surgical pathology at national conferences including the United States and Canadian Academy of Pathology (USCAP) Annual Meeting and American Society for Clinical Pathology (ASCP).

NEW YORK, New York

General Surgery - Surgical, Oncology, Hepato-Pancreato-Biliary Surgery, General Surgery, Clinical Research, Cancer, stomach, pancreas, liver, biliary tree, small bowel, colon, sarcomas, robotic surgery

Umut Sarpel, MD, MSc, is a board-certified surgeon who specializes in Surgical Oncology and Hepato-Pancreato-Biliary Surgery. She received her Bachelor of Science degree with Distinction in Research from the University of Rochester and earned her medical degree from the State University of New York at Buffalo. Dr. Sarpel completed her residency in General Surgery at the Icahn School of Medicine at Mount Sinai and then pursued an additional two years of fellowship training in the field of Surgical Oncology while attaining a Master of Science in Clinical Research. She is a Fellow of the American College of Surgeons and a Fellow of the Society of Surgical Oncology. Dr. Sarpel specializes in the care of patients with cancers of the stomach, pancreas, liver, biliary tree, small bowel, and colon, as well as sarcomas. Her practice includes open and robotic surgery. In addition, she performs Heated Intraperitoneal Chemotherapy (HIPEC) for the treatment of carcinomatosis. A compelling stor...

Oakwood, Ohio

General Surgery, Trauma Surgery - Critical Care Surgery, Chest Wall Injury, Rib Fractures, Traumatic Brain Injury, Spinal Cord Injury, Small Bowel, Colon, Gallbladder, Appendix, Hernia, Shock, Hemorrhage, Coagulopathy, Sepsis, Infections, Complications, Quality, Neurocritical Care

Dr. Gregory Semon is a distinguished surgeon who currently serves as an Associate Professor of Surgery at Wright State University Boonshoft School of Medicine. He practices general surgery, trauma surgery, critical care, and burn surgery at Miami Valley Hospital in Dayton, OH, which is a Level 1 Trauma Center verified by the American College of Surgeons. Dr. Semon hold three board certifications in General Surgery, Surgical Critical Care, and Neurocritical Care. He additionally holds a certificate in Acute Care Surgery from the American Association for the Surgery of Trauma. He completed his surgical training at Ohio University/Kettering Health Network in Dayton, OH and his surgical critical care and acute care surgery fellowships at Orlando Regional Medical Center in Orlando, FL. In addition to his clinical and academic duties, Dr. Semon holds multiple administrative roles, including serving as Director of the Surgical Intensive Care Unit at Miami Valley Hospital. He also wor...

READING, Pennsylvania

General Surgery, Trauma Surgery - Trauma surgery, general surgery of bowel, appendix, obstruction, gallbladder and biliary, wounds, hernia, colon, abdomen, soft tissue infection, shock, critical illness, sepsis, surgical critical Care, organ failure, surgical ethics, credentialing, quality, standards, team dynamics in healthcare

Shannon Marie Foster MD FACS is an active acute care surgeon - performing trauma, critical care, and emergency general surgery in daily practice and certified by the American Board of Surgery in both General Surgery and Surgical Critical Care. She is a leader in the surgical community and holds multiple positions in the professional organizations responsible for setting the standards of care. Heavily involved in policy creation, surgical quality and performance review - she is highly skilled at not only reviewing complex cases, but providing education regarding best practice to patients, learners and those without primary medical backgrounds. Dr. Foster has invested time and effort to better understand the many aspects of the business of medicine, intentionally working and consulting in varying practice types from rural to urban, community to academic, small to large hospitals and across systems to ensure an understanding of the complex aspects of care delivery in a variety of h...

Houston, Texas

Colon & Rectal Surgery, General Surgery - colonoscopy, GI surgery, proctology, pelvic surgery, robotic surgery, colon cancer, rectal cancer, Diverticulitis, Appendectomy, minimally invasive surgery, intestine, colon, rectum, Gallbladder, Cholecystectomy , Appendix, Colostomy, Ileostomy

Dual board certified general and colorectal surgeon in the Houston area. I am an assistant professor of surgery and owner of my solo general and colorectal surgery practice. Extensive experience in academic surgery (OH, NY and TX), resident and medical student education and serving low income/under resourced communities. I take care of patients with disorders of the gallbladder, small bowel, appendix, benign skin and soft tissue, colon, rectum and anus. I am certified in robotic surgery and perform colonoscopy as part of my practice.