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Gastroenterology

Diagnostic + Therapeutic Endoscopy Program

Overview

At the Diagnostic and Therapeutic Endoscopy Program at Tufts Medical Center in downtown Boston, we can diagnose and treat various conditions affecting the gastrointestinal tract, bile ducts or pancreas using minimally invasive endoscopic techniques.

We offer the following advanced procedures:

  • Routine diagnostic and therapeutic upper endoscopy
  • Colonoscopy for colon cancer screening
  • Removal of polyps
  • Small bowel video capsule

An endoscope is a thin tube with a tiny camera at the end to visualize the inside of the body. For many patients, endoscopy offers a safe and effective alternative to major surgery.

Gastroenterologists, surgeons, medical oncologists and other doctors throughout the region refer patients to our program.  And at Tufts Medical Center, we strive to schedule patient appointments promptly.

General diagnostic & therapeutic endoscopy

Our doctors are highly experienced in using the following endoscopic procedures to diagnose and/or treat many disorders:  

  • Colonoscopy (for colorectal screening, polyp removal and evaluation of gastrointestinal bleeding, inflammatory bowel disease and gastrointestinal disease)
  • Upper endoscopy
  • Small bowel capsule endoscopy

Advanced interventional endoscopy

Our team also performs the following advanced interventional endoscopic procedures for more complex diseases:

  • Endoscopic retrograde cholangiopancreatography (ERCP)
  • Endoscopic ultrasound
  • Endoscopic resection of large colonic and gastrointestinal polyps
  • Endoscopic therapy for Barrett's esophagus (BARRX/HALO radiofrequency ablation, endoscopic mucosal resection)
  • Endoscopic therapy for achalasia (botulinum toxin injection therapy, pneumatic dilation)
  • Placement of enteral feeding tubes
  • Placement of esophageal and enteral stents
  • Deep small bowel enteroscopy (single balloon enteroscopy, spiral enteroscopy)
  • Sphincter of Oddi manometry
  • Routine upper endoscopy and colonoscopy

If you've been diagnosed with a gastrointestinal disorder, one of these nonsurgical treatment options may be right for you. Keep in mind, however, that several require specialized training and expertise that you won't find at every hospital.

Meet your care team

We have deep experience across a variety of endoscopic procedures.

Moises Guelrud, MD
Dr. Guelrud previously practiced at the Universidad Central de Venezuela, where he was a Clinical Professor in Medicine and Pediatrics. He is a world-renowned expert in pancreaticobiliary endoscopy, sphincter of Oddi dysfunction and pediatric ERCP.

Dr. Guelrud's expertise includes ERCP, sphincter of Oddi manometry, pediatric ERCP, endoscopic therapy for Barrett's esophagus, endoscopic resection of large colonic and gastrointestinal polyps, deep enteroscopy, and enteral and esophageal stent placement. He is fluent in Spanish and English.

Specialists in ERCP, Endoscopic Ultrasound & More

Our program offers a wide range of advanced interventional endoscopic services, including:

ERCP

  • Management of bile duct stones
  • Management of bile duct strictures
  • Management of benign and malignant biliary obstruction
    • Sphincter of Oddi manometry
    • Spyglass cholangioscopy
  • Management and evaluation of pancreatic disease (chronic pancreatitis)

Endoscopic Ultrasound

  • Evaluation and management of pancreatic cystic lesions
  • Staging and diagnosis of gastrointestinal malignancies, including pancreatic, esophageal, rectal and gastric cancers
  • Evaluation of chronic pancreatitis
  • Evaluation of gastrointestinal subepithelial lesions

Other Services

  • Endoscopic resection of large colonic polyps
  • Endoscopic therapy for Barrett's esophagus (e.g. HALO/BARRX radiofrequency ablation, endoscopic mucosal resection)
  • Deep enteroscopy (e.g. single balloon enteroscopy, spiral enteroscopy) for evaluation and management of small bowel disease
  • Endoscopic therapy for achalasia (e.g. botulinum toxin injection, pneumatic dilation)
  • Enteral and esophageal stent placement
  • Management of complex esophageal strictures

Doctors + Care Team

Joel V. Weinstock, MD
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Joel V. Weinstock, MD

Title(s): Chief, Division of Gastroenterology/Hepatology; Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-4505

Gastroenterology, inflammatory bowel diseases, mucosal immunity, general gastroenterology, GI bleeding, endoscopy

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Harmony Allison, MD
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Harmony Allison, MD

Title(s): Gastroenterologist; Clinical and Research Instructor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-1480

Gastrointestinal motility, inflammatory bowel disease, general GI and endoscopy, diarrhea, constipation, celiac sprue and limited LFT abnormalities

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Aaron M. Dickstein, MD

Aaron M. Dickstein, MD

Title(s): Gastroenterologist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

General gastroenterology, gastrointestinal endoscopy and colonoscopy, gastrointestinal motility, obscure GI bleeding, fecal microbiota transplantation

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Moises Guelrud, MD
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Moises Guelrud, MD

Title(s): Gastroenterologist; Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-4505

Gastroenterology, sphincter of Oddi manometry in children and adults, ERCP (diagnosis and therapeutic) in children and adults, ECRP (diagnosis and therapeutic) in children and adults, endoscopic diagnosis and treatment of Barrett's esophagus, magnification endoscopy and chromoendoscopy, pancreatic diseases

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John Leung, MD
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John Leung, MD

Title(s): Director, Food Allergy Center at Tufts Medical Center; Co-Director, Food Allergy Center at Floating Hospital for Children; Allergist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Pediatric Allergy, Gastroenterology, Pediatric Gastroenterology
Appt. Phone:
Fax #:

Allergic rhinitis (seasonal allergy), anaphylaxis, angioedema, asthma, celiac disease, chronic urticarial (hives), drug allergies, eczema, eosinophilic esophagitis/eosinophilic gastrointestinal disorders, food allergy (e.g. peanuts, cow milk, soy, etc.), food intolerance (lactose, fructose, fructan), food protein-induced enterocolitis syndrome (FPIES), immunodeficiency, oral allergy syndrome, pruritus, sinusitis, stinging insect allergy, wheat hypersensitivity

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Lori B. Olans, MD, MPH
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Lori B. Olans, MD, MPH

Title(s): Gastroenterologist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-8615

General gastroenterology

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Jatin Roper, MD
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Jatin Roper, MD

Title(s): Director, Center for Hereditary Gastrointestinal Cancer; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology, Molecular Oncology Research Institute
Appt. Phone: 617-636-5883
Fax #: 617-636-4505

Familial colorectal cancer, Lynch syndrome, familial adenomatous polyposis, Cowden’s syndrome, general gastroenterology, gastric cancer screening, gastrointestinal endoscopy and colonoscopy

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Mark J. Sterling, MD

Mark J. Sterling, MD

Title(s): Advanced Endoscopist
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

ERCP and EUS, pancreatico-biliary endoscopy including EUS guided biopsy, direct cholangioscopy and laser lithotripsy, deep small bowel enteroscopy including management of obscure GI bleeding, GI luminal stenting, endoscopic mucosal resection

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Kathleen Viveiros, MD
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Kathleen Viveiros, MD

Title(s): Director, Gastroenterology/Hepatology Fellowship Program
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-4207

Hepatology, pre- and postliver transplant, hepatitis, chronic liver disease, general gastroenterology

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Call Us
617-636-5883