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Living with Thymic-renal-anal-lung dysplasia

A rare genetic condition with slow growth before birth, kidney differences, and a small or missing thymus gland.

Understanding Thymic-renal-anal-lung dysplasia

Thymic-renal-anal-lung dysplasia is a rare genetic condition that affects growth before birth, the kidneys, and the thymus gland.

It is marked by slow growth during pregnancy, kidneys that did not form normally (renal dysgenesis), and a thymus with one lobe or none. The thymus is a small gland in the chest that helps the immune system. It starts during pregnancy and is noticed in the newborn period.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet, but the summary describes these features:

  • Slow growth before birth
  • Kidneys that did not form normally (renal dysgenesis)
  • A thymus with one lobe, or no thymus

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and kidney specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Genetic specialists (geneticists); Kidney specialists (nephrologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with National Kidney Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Would genetic testing help find the cause in our family?
Which specialists, such as a kidney specialist, should we see?
How might the thymus differences affect the immune system?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Recessive

GARD says this condition is autosomal recessive, so a child inherits a changed copy of a gene from each parent. It doesn't name a specific gene.

GeneticKidney

Also known as: thymic, renal, anal, lung dysplasia syndrome

Patient organizations

Source: NIH GARD · Thymic-renal-anal-lung dysplasiaGARD ID 5202 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Thymic-renal-anal-lung dysplasia.

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