Trait: prurigo nodularis

Trait Information
Identifier MONDO_0026045
Description Prurigonodularis (PN) is a skin disease in which hard crusty lumps are formed on the skin that itches intensely. Repetitive rubbing, scratching, and touching results in more lesions in the skin. The itching is so intense that people scratch themselves to the point of bleeding or pain. The lumps formed in the skin are hard, and have about a half inch across, with a dry and rough top that is often scratched open. They tend to be located in the areas most easily reached and are worse on the outer sides: arms, shoulders and legs. The trunk, face and even palms can also be affected. The exact cause is unknown but some factors triggering PN include liver and kidneys problems, nervous and mental conditions and other skin diseases. Prurigo nodulares, in some cases, can be seen in other diseases such as lymphoma, chronic autoimmune cholestatic hepatitis, HIV infection, severe anemia,or a chronic kidney disease-related itching known as uremic pruritus. Treatment is very difficult, and may include corticoids, antihistaminic and other medication such as thalidomide and similar (Lenalidomide). In some cases, cryotherapy, photochemotherapy and habit reversal therapy for the itch-scratch cycle has improved the symptoms. PN can last for many years, and the itching is so intense that may affect all the everyday activities. [GARD: 0007480]
Trait category
Other disease

Associated Polygenic Score(s)

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G - Source of Variant Associations (GWAS)
D - Score Development/Training
E - PGS Evaluation
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Not Reported
Polygenic Score ID & Name PGS Publication ID (PGP) Reported Trait Mapped Trait(s) (Ontology) Number of Variants Ancestry distribution Scoring File (FTP Link)
PGP000558 |
Vasavda C et al. J Invest Dermatol (2023)
Prurigo nodularis prurigo nodularis 6,314

Performance Metrics

Disclaimer: The performance metrics are displayed as reported by the source studies. It is important to note that metrics are not necessarily comparable with each other. For example, metrics depend on the sample characteristics (described by the PGS Catalog Sample Set [PSS] ID), phenotyping, and statistical modelling. Please refer to the source publication for additional guidance on performance.

PGS Performance
Metric ID (PPM)
Evaluated Score PGS Sample Set ID
Performance Source Trait PGS Effect Sizes
(per SD change)
Classification Metrics Other Metrics Covariates Included in the Model PGS Performance:
Other Relevant Information
PPM020437 PGS004324
European Ancestry|
405,582 individuals
PGP000558 |
Vasavda C et al. J Invest Dermatol (2023)
Reported Trait: Prurigo nodularis OR: 1.27 race, age, and sex

Evaluated Samples

PGS Sample Set ID
Phenotype Definitions and Methods Participant Follow-up Time Sample Numbers Age of Study Participants Sample Ancestry Additional Ancestry Description Cohort(s) Additional Sample/Cohort Information
  • 73 cases
  • , 405,509 controls
European UKB