“We enjoy the shade of a mighty oak tree because someone before us planted it.”

  • A study of genetic variations associated with a specific disease like cholangiocarcinoma
  • Involves two groups of participants: people with, and people without, the disease
  • DNA from a small sample of blood is obtained from each participant
  • Results help researchers to develop better strategies for prevention, screening, diagnosis and treatment

Our goal is to have 2,500 volunteers  participate in the Genome-Wide Association Study (GWAS).


Why participate?

Your participation will help scientists to:

  • Inspire progress and find new ways to prevent, detect, diagnose, and treat cholangiocarcinoma
  • Discover important genetic risk factors for cholangiocarcinoma that may affect your family

Who can participate?

  • Everyone!
  • Patients, caregivers, family, friends, co-workers, neighbors – men and women of any age
  • You do NOT need to know someone with cholangiocarcinoma . . . we are looking for ALL volunteers!

How will you participate?


  • After you Submit your Contact Information Form, a Study Coordinator will contact you within a few days
  • A kit with instructions will be mailed to you
  • There is no charge to participate – any costs for drawing the blood will be reimbursed
  • The blood sample can be drawn by your family doctor or anywhere in your community; you do not need to go to the Mayo Clinic or any of the other participating institutions
  • GWAS participants are not required to provide urine or stool samples or any future blood samples
  • Original signatures are required on the Consent Form (only pages 10, 11 & 13 need to be mailed back to the Study Coordinator)
  • We will be very happy to answer ALL of your questions:
    Nellie A. Campbell <>

There is a critical need for cholangiocarcinoma research.

Dear Cholangiocarcinoma Foundation Patient Community, I write today to ask for your help. Although this is thought to be a rare disease, cases of cholangiocarcinoma are rising in the US and worldwide. Scientists do not know what causes cholangiocarcinoma or how it can be treated effectively.

Researchers are trying to find individuals who might have a high risk for developing cholangiocarcinoma so they can identify new ways to detect, diagnose, and treat it. Mayo Clinic is one of many institutions participating in a Genome-Wide Association Study (GWAS) for cholangiocarcinoma. We compare DNA from small samples of blood from two groups: people with the disease (you) and people without (your family members or friends).

This helps us to identify important genetic risk factors for cholangiocarcinoma.

There is no cost to you and it is easy to participate by donating a small sample of blood and completing a medical history questionnaire.


Lewis R. Roberts, M.B. Ch.B., Ph.D Mayo Clinic, Division of Gastroenterology and Hepatology

Submit your Contact Information Form now.

The Study Coordinator will follow up within a few days.

Participating Institutions

  • Mayo Clinic Rochester (USA)
    Dr. Lewis Roberts
  • Oncóloga Médico-Instituto Nacional del Cáncer (Chile)
    Dr. med. Bettinna Muller
  • University of Manchester (U.K.)
    Dr. Juan Valle
  • The University of Hong Kong, Hong Kong, China
    Dr. Thomas Yau
  • Alberta Health Services (Canada)
    Dr. Oliver Bathe
  • University Mainz, University Medical Center of the Johannes Gutenberg (Germany)
    Dr. Peter Galle and Dr. Arndt Weinmann
  • Mayo Clinic Arizona (USA)
    Dr. Mitesh Borad
  • Universitätsklinikum des Saarlandes
    Dr. Vincent Zimmer and Frank Lammert
  • Massachusetts General Hospital
    Dr. Andrew Zhu and Dr. Nabeel Bardeesy
  • Imperial College (UK)
    Dr. Shahid Khan
  • Biodonostia Research Institute  (Spain)
    Dr. Jesus Banales
  • University Health Network, Toronto, Canada
    Dr. Sean Cleary
  • Johns Hopkins, Baltimore, Maryland
    Dr. Stephen Meltzer and Dr. Florin Selaru
  • Mayo Clinic Florida (USA)
    Dr. Tushar Patel
  • MD Anderson Cancer Center (USA)
    Dr. Manal Hassan
  • University of California, San Francisco (USA)
    Dr. Kate Kelly
  • National Cancer Institute
    Dr. Jill E. Koshiol
  • Baylor College of Medicine
    Dr. Prasun Kumar Jalal
  • Harvard Cancer Center
    Dr. Rebecca Miksad
  • Mayo Clinic, Rochester, MN (Cancer Center and Pancreatic Cancer Research)
    Dr. Gloria M. Petersen
  • Liver Associates of Texas
    Dr. Ankoma-Sey
  • University of Rochester in Rochester, New York
    Dr. Aram Hezel
  • Karolinska Institutet at Karolinska University Hospital, Huddinge
    Dr. Bengt Isaksson and  Dr. Weimin Ye
  • University of Puerto Rico, School of Medicine
    Jose Rivera Esther A. Torres Dr. Irene Villami
  • Loyola Medicine
    Dr. Steve Scaglione
  • University of Virginia
    Dr. Osama Rahma
  • University of San Diego, CA (UCSD)
    Robert Gish Yuko Kono


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