Hereditary palmoplantar keratoderma, Gamborg-Nielsen type is characterised by the presence of diffuse palmoplantar keratoderma without associated symptoms. The syndrome has been described in multiple families from the northernmost county of Sweden (Norrbotten). The palmoplantar keratoderma found in the Gamborg-Nielsen type disease is milder than that found in Mal de Meleda but more severe than that found in Thost-Unna palmoplantar keratoderma (see these terms). Transmission is autosomal recessive.

Immunodeficiency-51 (IMD51) is an autosomal recessive primary immune deficiency that is usually characterized by onset of chronic mucocutaneous candidiasis in the first years of life. Most patients also show recurrent Staphylococcal skin infections, and may show increased susceptibility to chronic bacterial respiratory infections. Patient cells show a lack of cellular responses to stimulation with certain IL17 isoforms, including IL17A (603149), IL17F (606496), IL17A/F, and IL17E (IL25; 605658) (summary by Levy et al., 2016).

Immunodeficiency-42 is an autosomal recessive primary immunodeficiency characterized by increased susceptibility to mycobacterial and candidal infections beginning in infancy. Patients vaccinated with BCG are particularly at risk for developing disseminated mycobacterial infections (summary by Okada et al., 2015).