Questions about rare diseases?
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Questions about rare diseases?
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Disease at a Glance

Summary
Hyperparathyroidism-jaw tumor syndrome (HPT-JT) is an inherited condition that causes overactivity of the parathyroid glands (hyperparathyroidism). These glands regulate the body's use of calcium, so overactivity can lead to high calcium levels in the blood (hypercalcemia). The syndrome typically begins in late adolescence or early adulthood. The hyperparathyroidism in people with HPT-JT is usually caused by a benign tumor in the parathyroid gland called a parathyroid adenoma. In some people with HPT-JT, it is caused by a cancerous (malignant) tumor called a parathyroid carcinoma. Signs and symptoms of hyperparathyroidism may include kidney stones, reduced bone mass, fatigue, muscle weakness, bone or joint pain, and constipation. Some people with HPT-JT also develop a benign tumor in the jaw called an ossifying fibroma. These tumors can grow quickly if not treated. Other features of HPT-JT may include kidney growths such as cysts, hamartomas, or rarely, Wilms tumor. Women with HPT-JT may develop benign or malignant tumors in the uterus. HPT-JT is caused by genetic changes in the CDC73 gene and inheritance is autosomal dominant. The diagnosis is based on the presence of signs and symptoms (identified with blood tests for hyperparathyroidism and imaging studies for tumors) and genetic testing.
Summary
Hyperparathyroidism-jaw tumor syndrome (HPT-JT) is an inherited condition that causes overactivity of the parathyroid glands (hyperparathyroidism). These glands regulate the body's use of calcium, so overactivity can lead to high calcium levels in the blood (hypercalcemia). The syndrome typically begins in late adolescence or early adulthood. The hyperparathyroidism in people with HPT-JT is usually caused by a benign tumor in the parathyroid gland called a parathyroid adenoma. In some people with HPT-JT, it is caused by a cancerous (malignant) tumor called a parathyroid carcinoma. Signs and symptoms of hyperparathyroidism may include kidney stones, reduced bone mass, fatigue, muscle weakness, bone or joint pain, and constipation. Some people with HPT-JT also develop a benign tumor in the jaw called an ossifying fibroma. These tumors can grow quickly if not treated. Other features of HPT-JT may include kidney growths such as cysts, hamartomas, or rarely, Wilms tumor. Women with HPT-JT may develop benign or malignant tumors in the uterus. HPT-JT is caused by genetic changes in the CDC73 gene and inheritance is autosomal dominant. The diagnosis is based on the presence of signs and symptoms (identified with blood tests for hyperparathyroidism and imaging studies for tumors) and genetic testing.
Read More
Resource(s) for Medical Professionals and Scientists on This Disease:
  • Orphanet  provides GARD with information for this disease.
  • RARe-SOURCE™  offers rare disease gene variant annotations and links to rare disease gene literature.
  • GeneReviews  provides clinical information on genetic diseases, including diagnosis, treatment, and genetic counseling.

About Hyperparathyroidism-jaw tumor syndrome

Many rare diseases have limited information. Currently, GARD aims to provide the following information for this disease:

  • Population Estimate:Fewer than 1,000 people in the U.S. have thisdisease.
  • Symptoms:May start to appear as a Teenager and as an Adult.
  • Cause:This disease has more than one possible cause.
  • Organizations:Patient organizations are available to help find a specialist, or advocacy and support for this specific disease.
  • Categories:CancerGenetic DiseasesKidney DiseasesEndocrine Diseases
When Do Symptoms of Hyperparathyroidism-jaw tumor syndrome Begin?
Symptoms of this disease may start to appear as a Teenager and as an Adult.

The age symptoms may begin to appear differs between diseases. Symptoms may begin in a single age range, or during several age ranges. The symptoms of some diseases may begin at any age. Knowing when symptoms may have appeared can help medical providers find the correct diagnosis.
Prenatal
Before Birth
Newborn
Birth-4 weeks
Infant
1-23 months
Child
2-11 years
Adolescent Selected
12-18 years
Adult Selected
19-65 years
Older Adult
65+ years
Symptoms may start to appear as a Teenager and as an Adult.
This information comes from Orphanet

Symptoms

The types of symptoms experienced, and their intensity, may vary among people with this disease. Your experience may be different from others. Consult your health care team for more information.

The following describes the symptom(s) associated with this disease along with the corresponding body system(s), description, synonyms, and frequency (Note: Not all possible symptoms may be listed):
Endocrine System Endocrine System

30 Symptoms

30 Symptoms

30 Symptoms

Endocrine System

The endocrine system is made up of a series of glands that produce and secrete hormones throughout the body, including the thyroid, pituitary, pineal, and adrenal glands, and the thymus, pancreas, testes, and ovaries. When endocrine glands produce too much or too little hormone, health problems such as weight gain, high blood pressure, and changes in sleep, mood, and behavior can occur. Disease of the endocrine can be diagnosed and treated by an endocrinologist.
Medical Term

Parathyroid adenoma

Frequency
Uncommon
Always
Always
Always
Description
A benign tumor of the parathyroid gland that can cause hyperparathyroidism.
Synonym
Parathyroid adenomas
Open detail view
30 Symptoms
This information comes from the Human Phenotype Ontology (HPO)

Causes

What Causes This Disease?

Genetic Mutations

Hyperparathyroidism-jaw tumor syndrome is caused by genetic mutations, also known as pathogenic variants. Genetic mutations can be hereditary, when parents pass them down to their children, or they may occur randomly when cells are dividing. Genetic mutations may also result from contracted viruses, environmental factors, such as UV radiation from sunlight exposure, or a combination of any of these. Learn more about genetic diseases from the National Library of Medicine (NLM).

If you suspect you may have this disease, you may want to start collecting your family health history. Information such as other family members who have had similar symptoms, when their/your symptoms first appeared, or exposures to any potential disease-causing environmental factors should be discussed with your medical team. This tool from the Surgeon General can help you collect your family health history.

Find Your Community

How Can Patient Organizations Help?

Patient organizations can help patients and families connect. They build public awareness of the disease and are a driving force behind research to improve patients' lives. They may offer online and in-person resources to help people live well with their disease. Many collaborate with medical experts and researchers.

Services of patient organizations differ, but may include:

  • Ways to connect to others and share personal stories
  • Easy-to-read information
  • Up-to-date treatment and research information
  • Patient registries
  • Lists of specialists or specialty centers
  • Financial aid and travel resources

Please note: GARD provides organizations for informational purposes only and not as an endorsement of their services. Please contact an organization directly if you have questions about the information or resources it provides.

View GARD's criteria for including patient organizations, which can be found under the FAQs on our About page. Request an update or to have your organization added to GARD. 

Patient Organizations

6 Organizations

Organization Name

Who They Serve

Helpful Links

Country

National Kidney Foundation
People With

Kidney diseases

Helpful Links
Country

United States

Renal Support Network
People With

Kidney diseases

Helpful Links
Country

United States

EveryLife Foundation for Rare Diseases
People With

Rare Diseases

Helpful Links
Country

United States

Genetic Alliance
People With

Rare Diseases

Helpful Links
Country

United States

Global Genes
People With

Rare Diseases

Helpful Links
Country

United States

National Organization for Rare Disorders
People With

Rare Diseases

Helpful Links
Country

United States

Participating in Clinical Studies

Clinical studies are part of clinical research and play an important role in medical advances, including for rare diseases. Through clinical studies, researchers may ultimately uncover better ways to treat, prevent, diagnose, and understand human diseases.

What Are Clinical Studies?

Clinical studies are medical research involving people as participants. There are two main types of clinical studies:

  1. Clinical trials determine if a new test or treatment for a disease is effective and safe by comparing groups receiving different tests/treatments.
  2. Observational studies involve recording changes over time among a specific group of people in their natural settings.
Learn more about clinical trials from this U.S. Food & Drug Administration webpage.

Why Participate in Clinical Studies?

People participate in clinical trials for many reasons. People with a disease may participate to receive the newest possible treatment and additional care from clinical study staff as well as to help others living with the same or similar disease. Healthy volunteers may participate to help others and to contribute to moving science forward.

To find the right clinical study we recommend you consult your doctors, other trusted medical professionals, and patient organizations. Additionally, you can use ClinicalTrials.gov to search for clinical studies by disease, terms, or location.

What if There Are No Available Clinical Studies?

ResearchMatch helps connect people interested in research studies  with researchers from top medical centers across the United States. Anyone from the U.S. can register with this free program funded by NIH. Researchers from participating institutions use the database to search for and invite patients or healthy volunteers who meet their study criteria to participate.

Join the All of Us Research Program!

The All of Us Research Program is inviting 1 million people from all backgrounds across the U.S. to help build one of the most diverse health databases in history. Researchers will use the data to learn how our biology, lifestyle, and environment affect health. This may one day help them find ways to treat and prevent diseases.

What Are Clinical Studies?

Clinical studies are medical research involving people as participants. There are two main types of clinical studies:
  1. Clinical trials determine if a new test or treatment for a disease is effective and safe by comparing groups receiving different tests/treatments.
  2. Observational studies involve recording changes over time among a specific group of people in their natural settings.
Learn more about clinical trials from this U.S. Food & Drug Administration webpage.
Read More

Why Participate in Clinical Studies?

People participate in clinical trials for many reasons. People with a disease may participate to receive the newest possible treatment and additional care from clinical study staff as well as to help others living with the same or similar disease. Healthy volunteers may participate to help others and to contribute to moving science forward.

To find the right clinical study we recommend you consult your doctors, other trusted medical professionals, and patient organizations. Additionally, you can use ClinicalTrials.gov to search for clinical studies by disease, terms, or location.
Read More

What if There Are No Available Clinical Studies?

ResearchMatch helps connect people interested in research studies  with researchers from top medical centers across the United States. Anyone from the U.S. can register with this free program funded by NIH. Researchers from participating institutions use the database to search for and invite patients or healthy volunteers who meet their study criteria to participate.

Join the All of Us Research Program!

The All of Us Research Program is inviting 1 million people from all backgrounds across the U.S. to help build one of the most diverse health databases in history. Researchers will use the data to learn how our biology, lifestyle, and environment affect health. This may one day help them find ways to treat and prevent diseases.

ClinicalTrials.gov, an affiliate of NIH, provides current information on clinical research studies in the United States and abroad. Talk to a trusted doctor before choosing to participate in any clinical study. We recommend checking this site often and searching for studies with related terms/synonyms to improve results.
Search ClinicalTrials.gov for this disease
Contact a GARD Information Specialist if you need help finding more information on this rare disease or available clinical studies. Please note that GARD cannot enroll individuals in clinical studies. 
1-888-205-2311
Available toll-free Monday through Friday from 12 pm to 6 pm Eastern Time
(Except: Federal Holidays)
Contact GARD
Use the contact form to send your questions to a GARD Information Specialist.

Please allow 2 to 10 business days for us to respond.
ClinicalTrials.gov, an affiliate of NIH, provides current information on clinical research studies in the United States and abroad. Talk to a trusted doctor before choosing to participate in any clinical study. We recommend checking this site often and searching for studies with related terms/synonyms to improve results.
Search ClinicalTrials.gov for this disease
Contact a GARD Information Specialist if you need help finding more information on this rare disease or available clinical studies. Please note that GARD cannot enroll individuals in clinical studies. 
1-888-205-2311
Available toll-free Monday through Friday from 12 pm to 6 pm Eastern Time
(Except: Federal Holidays)
Contact GARD
Use the contact form to send your questions to a GARD Information Specialist.

Please allow 2 to 10 business days for us to respond.
About the Disease

Learn about symptoms, cause, support, and research for a rare disease. 

Getting a Diagnosis

Take steps toward getting a diagnosis by working with your doctor, finding the right specialists, and coordinating medical care.

Getting a Diagnosis

Take steps toward getting a diagnosis by working with your doctor, finding the right specialists, and coordinating medical care.

Last Updated: September 2024