Karen Queliza

Karen Queliza, MD

Pediatric Gastroenterologist

Areas of Expertise

Conditions I Treat

  • Gastrointestinal diseases and complications
  • Gastrointestinal complications

My Specialties

  • Endoscopy
Dr. Queliza's Office Information
Languages: English
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Get to Know Me

I am a pediatric gastroenterologist, a doctor who specializes in the care of children with digestive disorders. I joined the MSK Kids team in 2019 to care for and support patients with primary gastrointestinal (GI) diseases and GI complications related to cancer and its treatment. I collaborate very closely with medical and surgical oncologists to best address the GI issues that can occur during and after cancer treatment. I also see patients who have an increased risk of GI cancer due to inherited genetic abnormalities (such as polyposis syndromes).

I chose this subspecialty because of my own interest in diseases of the GI tract and in the medications and procedures we use to address them. I am driven to better understand how GI issues affect children with cancer and how to improve the diagnosis and treatment. Most of what we know in this unique group of patients is based on studies and experience in adults. Therefore, the topic of pediatric “onco-gastroenterology” (the GI care of patients with pediatric cancers) is an essential area for exploration and research.

As a pediatric gastroenterologist, I perform endoscopy (the examination of the digestive tract through a special tube) to evaluate and treat GI tract disorders. I completed a fellowship in Pediatric Gastroenterology, Hepatology and Nutrition at Baylor College of Medicine and Texas Children’s Hospital. Afterward, I stayed for an additional year to complete a Pediatric Advanced Endoscopy fellowship and learned advanced endoscopic techniques, such as endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), and single balloon enteroscopy. I also earned a Master of Science degree in Clinical Investigation from Baylor College of Medicine. My research interests include hereditary polyposis syndromes, pancreatic and biliary diseases, and outcomes of endoscopy in children.

At MSK Kids, I participate in the Pediatric Cancer Predisposition Screening Program and perform surveillance endoscopy to monitor children with hereditary polyposis syndromes — inherited diseases that involve the development of tissue growths (called polyps) in the GI tract that may develop into cancer. I am also an active member of the Pediatric Multidisciplinary Feeding Program, which focuses on the treatment of children who experience feeding difficulties during and even after cancer therapy. Furthermore, I participate in the Multidisciplinary Graft-Versus-Host Disease (GVHD) Clinic for patients who develop GVHD, a potential complication of allogeneic hematopoietic stem cell transplantation (receiving a stem cell transplant from a donor).

Pediatric cancer care is complex and can be overwhelming for patients and their families. I strive to continuously recognize these challenges with compassion and to provide comprehensive services. Through diligence and close communication with my cancer care colleagues, I aim to provide high-quality care that aligns with each patient’s needs and values.

What I Do at MSK

I'm a pediatric gastroenterologist (GAS-troh-EN-teh-RAH-loh-jist) at MSK. A pediatric gastroenterologist is a doctor who treats children and adolescents and has special training in the gastrointestinal (GI) system. This includes the esophagus, intestines, stomach, bile ducts, gallbladder, liver, and pancreas.

  • Assistant Attending Pediatrician
Areas of Expertise

Conditions I Treat

  • Gastrointestinal diseases and complications
  • Gastrointestinal complications

My Specialties

  • Endoscopy

Insurance Information

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Disclosures

Members of the MSK Community often work with pharmaceutical, device, biotechnology, and life sciences companies, and other organizations outside of MSK, to find safe and effective cancer treatments, to improve patient care, and to educate the health care community. These activities outside of MSK further our mission, provide productive collaborations, and promote the practical application of scientific discoveries.

MSK requires doctors, faculty members, and leaders to report (“disclose”) the relationships and financial interests they have with external entities. As a commitment to transparency with our community, we make that information available to the public. Not all disclosed interests and relationships present conflicts of interest. MSK reviews all disclosed interests and relationships to assess whether a conflict of interest exists and whether formal COI management is needed.

Karen Queliza discloses the following relationships and financial interests:

No disclosures meeting criteria for time period


If you’re a patient at MSK and would like more information about your doctor’s external relationships, please talk with your doctor.

The information published here is a complement to other publicly reported data and is for a specific annual disclosure period. There may be differences between information on this and other public sites as a result of different reporting periods and/or the various ways relationships and financial interests are categorized by organizations that publish such data.

This page and data include information for a specific MSK annual disclosure period (January 1, 2024 through disclosure submission in spring 2025). This data reflects interests that may or may not still exist. This data is updated annually.

Learn more about MSK’s COI policies here. For questions regarding MSK’s COI-related policies and procedures, email MSK’s Compliance Office at ecoi@mskcc.org.


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