Children's Rare Disease Collaborative

At Boston Children’s Hospital, we are dedicated to advancing the understanding and treatment of rare diseases. A rare disease affects fewer than one person for every 200,000 people. These diseases can be genetic, infectious, or degenerative, and they often present unique challenges in diagnosis and treatment. 

About the CRDC

The Boston Children’s Rare Disease Collaborative (CRDC) was established in 2018 as a hospital-wide research effort. It includes 57 rare disease studies and features the Manton Center for Orphan Disease Research.

The CRDC’s mission is to:

• Find and understand genetic causes of rare diseases.
• Facilitate research-informed care.
• Provide families with genetic diagnoses that enable personalized treatments, including precision medicine and targeted therapies.

Rare diseases we study

Some patients may find that their rare disease does not fit into one specific area. Other patients may have ultra-rare diseases, which affect fewer than one person for every 50,000 people.

Below is a list of rare diseases studied by the CRDC, categorized by medical specialty.

Who we are

Based out of a leading teaching hospital, the CRDC fosters collaboration and innovation by connecting patients and families with:

• World-class experts
• Physician-scientists and researchers
• Pharmaceutical and industry partners
• Patient advocacy communities

Together, we strive to find new treatments, understand biological mechanisms, and discover the genetic causes of rare diseases using cutting-edge technologies.

Key outcomes

1. Diagnostic success: Diagnostic variants have been identified in 15% of patients, leading to changes in care for many of these cases. An additional 20% of cases have findings which are undergoing further research.
2. Research and enrollment: Over 13,000 participants have enrolled in more than 52 pediatric rare disease cohorts.
3. Innovative studies: Studies in rare pediatric diseases, including epilepsy and inflammatory bowel disease, have led to discoveries of novel genetic diseases.
4. Advanced techniques: The CRDC uses cutting-edge techniques such as whole exome sequencing, whole genome sequencing, RNA sequencing, and proteomics to uncover the genetic basis of rare diseases.
5. Impact on care: The use of research sequencing has expanded available genetic testing options for clinical care. These tests may not be covered by payors. Research also allows a “second look” at or reanalysis of nondiagnostic clinical testing. The findings from the CRDC have led to significant changes in treatment plans and have provided new insights into the genetic causes of various rare diseases.

Participate in research

Here is a typical step-by-step process for patients participating in a research study:

Patients can learn more about how to join a study by either contacting the research investigator directly or by being referred by another physician to the study. See disease-specific pages for more information.

1. Referral: Patient with rare or undiagnosed disease is referred to a CRDC study
2. Study eligibility confirmed: Study team reviews and confirms eligibility
3. Consent and enrollment: Study team contacts eligible patient to schedule an in-person or virtual informed consent meeting to review details of participation, benefits, risks, and limitations of the study
4. Study visit: Patients may undergo:
   • A physical exam with physician-scientist
   • Meeting a genetic counselor
   • Collection of study samples
5. Research: Research testing provided and funded by the study team may include:
   • Reanalysis of existing results
   • Whole exome sequencing
   • Whole genome sequencing
   • RNA sequencing
   • Functional assays
6. Diagnosis:
   1. Confirmation of diagnosis: Potential diagnoses are confirmed through clinical-grade testing
   2. Diagnosis discussion:
      • Results returned to the family
      • Genetic counseling and management recommendations are provided
   3. Followup: The study team may pursue further research including gene- or mutation-specific tailored treatment
7. Ongoing research: Currently available research testing may not result in a diagnosis. The research team will continue to pursue a diagnosis. Patients may be followed over time for:
   • Clinical updates
   • Natural history studies
   • Availability of new technologies
   • Advances in gene discovery, etc.
   • Reanalysis of genetic testing data