GTR Home > Conditions/Phenotypes > Keratosis palmoplantaris striata 1


Striate palmoplantar keratoderma belongs to a group of skin diseases in which there is thickening of the skin on the palms and soles. The striate form is characterized by longitudinal hyperkeratotic lesions extending the length of each finger to the palm, and hyperkeratotic lesions are restricted to regions of the body where pressure and abrasion are greatest (summary by Hunt et al., 2001). Patients with diffuse or focal forms of keratoderma associated with mutation in the DSG1 gene have also been reported (Keren et al., 2005; Milingou et al., 2006). Genetic Heterogeneity of Keratosis Palmoplantaris Striata Type II PPKS (PPKS2; 612908) is caused by mutation in the DSP gene (125647) on chromosome 6. Type III PPKS (PPKS3; 607654) is caused by mutation in the keratin-1 gene (KRT1; 139350) on chromosome 12q. For a general phenotypic description and a discussion of genetic heterogeneity of palmoplantar keratoderma (PPK), see epidermolytic PPK (144200). Nitoiu et al. (2014) reviewed desmosome biology in cardiocutaneous syndromes and inherited skin disease, including discussion of the involvement of the DSG1 and DSP genes. [from OMIM]

Available tests

6 tests are in the database for this condition.

Check Associated genes for additional relevant tests.

Associated genes


Clinical features


Show allHide all

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.