Is Hereditary Neuropathy With Liability To Pressure Palsies HNPP contagious?

Hereditary Neuropathy with Liability to Pressure Palsies (HNPP) is not contagious and cannot be spread through physical contact, sharing spaces, or any other form of interaction. It is a strictly genetic condition caused by a mutation in the PMP22 gene, meaning it is inherited within families rather than transmitted between people.

What causes Hereditary Neuropathy with Liability to Pressure Palsies?

Hereditary Neuropathy with Liability to Pressure Palsies (HNPP) is an autosomal dominant genetic disorder. It is caused by a deletion of a specific region on chromosome 17p12, which includes the PMP22 gene. This gene is responsible for producing a protein essential for the structure and function of the myelin sheath, the protective coating surrounding peripheral nerves. When this protein is deficient, the nerves become hypersensitive to compression, leading to the characteristic episodic palsies observed in those with HNPP.

Why is there no risk of transmission?

Because Hereditary Neuropathy with Liability to Pressure Palsies is rooted in a person's DNA, it is impossible for it to be "caught" like an infectious disease. You cannot contract HNPP from living with, touching, caring for, or being near someone who has the condition. The 89 members of the DiseaseMaps community living with HNPP face no risk to their friends, partners, or family members regarding contagion.

What are the triggers for HNPP symptoms?

While the condition is not contagious, certain environmental factors can trigger the onset of symptoms or worsen existing weakness in those with Hereditary Neuropathy with Liability to Pressure Palsies. Common physical triggers include:

• Prolonged pressure on nerves (e.g., leaning on elbows or crossing legs).


• Repetitive physical activities that involve friction or minor trauma to nerves.


• Strenuous physical exertion or heavy lifting.


• Positions that cause nerve entrapment or stretching.

Addressing stigma and misconceptions

The confusion regarding the contagiousness of Hereditary Neuropathy with Liability to Pressure Palsies often stems from a lack of public awareness about rare genetic disorders. Because symptoms like muscle weakness or numbness can appear suddenly, observers may incorrectly assume an acute illness or infection. It is vital to emphasize that HNPP is a physiological vulnerability of the nerves, not a communicable disease.

Next steps

• Consult with a neurologist or clinical geneticist to confirm a diagnosis through genetic testing.


• Join the DiseaseMaps.org community to connect with others who understand the daily management of HNPP.


• Work with an occupational therapist to identify and avoid daily activities that trigger nerve compression.

Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Hereditary neuropathy with liability to pressure palsies.


• Orphanet: Hereditary neuropathy with liability to pressure palsies (ORPHA:637).


• OMIM (Online Mendelian Inheritance in Man): Neuropathy, Hereditary, with Liability to Pressure Palsies (162500).


• Neuropathy Commons (Harvard University): Information on peripheral nerve disorders.