Clinical trial Recruiting at 1 site Observational Ages 1 Day to 100

Understanding lymphatic anomalies over time

Official title: A Prospective Natural History Study of Lymphatic Anomalies

Run by National Institutes of Health Clinical Center (CC) · NCT05731141 · Data updated 2026-11-12

This study is looking to see how lymphatic anomalies change over time in people who have them and their family members, to better understand these conditions and improve future treatments.

Quick facts

Study typeObservational
Ages1 Day to 100 Years
SexAll
Enrollment1200 (estimated)
SponsorNational Institutes of Health Clinical Center (CC)
NIH
Locations2 sites (Bethesda, Maryland and 1 other locations)
StatusRecruiting
StartedMarch 20, 2023
Main results expectedDecember 31, 2028
Study endsDecember 31, 2028
Registry record updatedOctober 23, 2026
Trial IDNCT05731141 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include individuals of any age with a suspected or confirmed lymphatic anomaly, as well as their unaffected parents or siblings aged 7 years or older.

Probably not a fit

Patients without any lymphatic anomalies or those who do not have first-degree relatives willing to participate may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to collect and analyze data on individuals with lymphatic anomalies to better understand the development and long-term outcomes of these conditions. Participants, including those affected and their unaffected family members, will undergo evaluations and provide biological specimens over an extended period. The study seeks to establish a longitudinal cohort, identify clinical features, and explore genetic factors associated with lymphatic diseases. By systematically documenting these anomalies, the research aims to improve prognostication and inform future treatment strategies.

Why it matters

Potential benefit: If successful, this study could lead to improved understanding and management of lymphatic anomalies, ultimately enhancing patient care.

How similar studies have gone: While there may be limited studies specifically focused on lymphatic anomalies, the approach of establishing a longitudinal cohort has shown promise in other areas of rare disease research.

Who can join: the full rules

Show full inclusion / exclusion criteria
* INCLUSION CRITERIA:

Affected (Proband)

In order to be eligible to participate in this study, an individual must meet one of the following criteria as determined after review of medical history:

* Current or history of lymphatic anomaly or symptoms suggestive of a lymphatic disorder Or
* An ill-defined vascular anomaly that is suspected to have an abnormal lymphatic component Or
* A pathogenic, likely pathogenic, or VUS in a genetic disorder with a known lymphatic component Or
* Clinical diagnosis of a syndrome with a known lymphatic component

Unaffected (First Degree Relatives: Parents and Siblings)

Genetic variants underlying complex lymphatic anomalies can be passed down through parents or be new in a child (de novo). Inclusion of first-degree relatives will assist in genetic analysis to delineate whether the variant is inherited or de novo.

To be eligible to participate as a first degree relative in this study, an individual must be a first-degree family member of an affected participants

EXCLUSION CRITERIA:

Affected Proband

An individual who meets any of the following criteria will be excluded from participation in this study after review of medical history, concomitant medication and allergy review, anthropometrics, and performance status:

-Any condition, in the opinion of the investigator, that would increase risk of participation or impair their ability to comply with protocol requirements.

Lymphatic anomalies that are definitively determined to be secondary by the principal investigator will be excluded from this study. For example, participants who develop a lymphedema after breast cancer surgery.

Unaffected (First Degree Relatives)

-Any condition, in the opinion of the investigator, that would increase risk of participation or impair their ability to comply with protocol requirements.

Where it's running

  • National Institutes of Health Clinical Center
    Bethesda, Maryland, United States
    Recruiting
  • Children's Hospital of Philadelphia
    Philadelphia, Pennsylvania, United States
    Not yet recruiting

Study contacts

  • Principal investigator: Sarah E Sheppard, M.D. — Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
  • Study coordinator: Andrea I Bowling, C.R.N.P.
  • Email: nichd_lymphaticanoma@mail.nih.gov
  • Phone: (301) 451-3824

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.