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Living with Graham-Boyle-Troxell syndrome

A rare condition reported in 3 patients, with noncancerous cysts in the kidney and lung that can show up as a belly mass.

Understanding Graham-Boyle-Troxell syndrome

Graham-Boyle-Troxell syndrome, also called cystic hamartoma of lung and kidney, is a rare developmental malformation reported in 3 patients.

It involves benign cysts in the kidney and lung that can appear as an abdominal mass. Related features include enlarged kidneys, abnormal kidney development, and a mesoblastic nephroma. GARD says there have been no further descriptions in the literature since 1987. It is noticed in infancy.

Signs & symptoms

Symptoms vary. GARD lists these among the most common:

  • Cystic kidneys (multicystic kidney dysplasia)
  • High blood pressure
  • Scarring of the lungs
  • Repeated breathing infections
  • Breathing difficulty

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 cancer specialists, 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
Cancer specialists (oncologists); 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
How are the kidney and lung cysts monitored?
How should blood pressure and kidney function be checked?
Which specialists, such as kidney and lung doctors, should be involved?

Quick facts

Symptoms usually startInfant

Changes in genes cause this condition. GARD does not name the gene or describe how it is inherited.

GeneticKidney

Also known as: cystic hamartoma of lung and kidney; graham boyle troxell syndrome

Patient organizations

Source: NIH GARD · Graham-Boyle-Troxell syndromeGARD ID 2557 · 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 Graham-Boyle-Troxell syndrome.

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