Nagashima-type palmoplantar keratosis

Summary
Synonym
  • NPPK
  • PPKN
  • palmoplantar keratoderma nagashima type
Definition
A nonepidermolytic palmoplantar keratoderma characterized by mild, well-demarcated, diffuse erythematous hyperkeratosis that is nonprogressive after the second decade of life which extends onto the dorsal surfaces of the palms and feet and the Achilles tendon area, with a high frequency of hyperhidrosis on the palms and soles and without flexion contractures or constricting bands that has_material_basis_in homozygous or compound heterozygous mutation in the SERPINB7 gene on chromosome 18q21.33.
Super Class
autosomal recessive disease nonepidermolytic palmoplantar keratoderma
Disease Ontology
DOID:0070555
UMLS
ORDO
Related Genes
Displaying 1 entry
Gene ID Gene Symbol Description Source
8710 SERPINB7 serpin family B member 7
Related Glycoprotein
Displaying 1 entry
UniProt ID Protein Name Source
O75635 Serpin B7

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Acknowledgements

Supported by JST NBDC Grant Number JPMJND2204

Partly supported by NIH Common Fund Grant #1U01GM125267-01


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Last updated: December 8, 2025