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Living with PrP systemic amyloidosis

A rare inherited condition in which prion protein builds up in the body, starting in adulthood.

Understanding PrP systemic amyloidosis

PrP systemic amyloidosis is a rare inherited neurological disorder caused by a buildup of prion protein (amyloid).

It is caused by shortened versions of the prion protein gene. It usually starts around age 30 to 40. Reported features include stomach and bowel problems, and problems with the automatic nervous system and bladder.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary describes these features:

  • Diarrhea
  • Nausea
  • Weakness and absent reflexes
  • Problems with automatic body functions (autonomic)
  • Bladder control problems (neurogenic bladder)
  • Urinary infections

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 brain and nervous system specialists, digestive system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in PRNP are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Amyloidosis Foundation and The Foundation for Peripheral Neuropathy may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Digestive system specialists (gastroenterologists); Genetic specialists (geneticists)
Expert care
Expert lists: Amyloidosis Foundation, The Foundation for Peripheral Neuropathy
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 Amyloidosis 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 for the PRNP gene help our family?
Should my relatives be tested?
Which specialists should be on my care team?

Quick facts

Symptoms usually startAdult
InheritanceAutosomal Dominant
GenesPRNP

This condition is caused by changes in the PRNP gene. It is autosomal dominant, meaning one changed copy of the gene is enough.

GeneticNeurologicalGastrointestinal

Also known as: chronic diarrhea with hereditary sensory and autonomic neuropathy; chronic diarrhea with hsan; chronic diarrhoea with hereditary sensory and autonomic neuropathy; chronic diarrhoea with hsan; prion protein systemic amyloidosis; prp (prion protein) systemic amyloidosis

Patient organizations

Source: NIH GARD · PrP systemic amyloidosisGARD ID 21632 · 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 PrP systemic amyloidosis.

Explore the PrP systemic amyloidosis blog

Explore research for PrP systemic amyloidosis

Explore actively recruiting PrP systemic amyloidosis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for PrP systemic amyloidosis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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