Naegeli–Franceschetti–Jadassohn syndrome

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Naegeli–Franceschetti–Jadassohn syndrome
Other names: Chromatophore nevus of Naegeli
Naegeli–Franceschetti–Jadassohn syndrome has an autosomal dominant pattern of inheritance

Naegeli–Franceschetti–Jadassohn syndrome (NFJS), also known as chromatophore nevus of Naegeli and Naegeli syndrome,[1][2] is a rare autosomal dominant[3] form of ectodermal dysplasia, characterized by reticular skin pigmentation, diminished function of the sweat glands, the absence of teeth and hyperkeratosis of the palms and soles. One of the most striking features is the absence of fingerprint lines on the fingers.

Naegeli syndrome is similar to dermatopathia pigmentosa reticularis,[4] both of which are caused by a specific defect in the keratin 14 protein.

Symptoms and signs

Reticulate and mottled hyperpigmentation

The clinical presentation of this condition includes[5]

  • Absence of dermatoglyphics
  • Reticular cutaneous hyperpigmentation
  • Nail dystrophy
  • Tooth enamel defects


NFJS is caused by mutations in the keratin 14 (KRT14) gene, located on chromosome 17q12-21.[3][6] The disorder is inherited in an autosomal dominant manner, which means that the defective gene responsible for a disorder is located on an autosome (chromosome 17 is an autosome), and only one copy of the defective gene is sufficient to cause the disorder, when inherited from a parent who has the disorder.[citation needed]


In most cases of Naegeli syndrome, a diagnosis is made based on the typical clinical features of this condition. The diagnosis may be confirmed by genetic testing of the KRT14 gene. [7]


Treatment for Naegeli syndrome is based on an individual's symptoms. Dry skin can be moisturized with creams. Exposure to heat should be limited. To avoid overheating, affected individuals should stay hydrated, wear appropriate clothing, and use wet dressings. Dental care is needed to treat cavities and tooth loss.[8]


It was named after Oskar Nägeli,[9] Adolphe Franceschetti, and Josef Jadassohn.

See also


  1. James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "27. Genodermatoses and congenital anomalies". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. pp. 548–549. ISBN 978-0-323-54753-6. Archived from the original on 2023-07-01. Retrieved 2023-05-26.
  2. Online Mendelian Inheritance in Man (OMIM): 161000
  3. 3.0 3.1 Lugassy, J; Itin, P; Ishida-Yamamoto, A; Holland, K; Huson, S; Geiger, D; Hennies, Hc; Indelman, M; Bercovich, D; Uitto, J; Bergman, R; Mcgrath, Ja; Richard, G; Sprecher, E (Oct 2006). "Naegeli-Franceschetti-Jadassohn syndrome and dermatopathia pigmentosa reticularis: two allelic ectodermal dysplasias caused by dominant mutations in KRT14". American Journal of Human Genetics. 79 (4): 724–30. doi:10.1086/507792. PMC 1592572. PMID 16960809.
  4. Schnur R, Heymann W (1997). "Reticulate hyperpigmentation". Semin Cutan Med Surg. 16 (1): 72–80. doi:10.1016/S1085-5629(97)80038-7. PMID 9125768.
  5. RESERVED, INSERM US14-- ALL RIGHTS. "Orphanet: Naegeli Franceschetti Jadassohn syndrome". Archived from the original on 4 March 2021. Retrieved 3 August 2021.
  6. Online Mendelian Inheritance in Man (OMIM): 148066
  7. "Naegeli syndrome | Genetic and Rare Diseases Information Center (GARD) – an NCATS Program". Archived from the original on 2018-04-18. Retrieved 2018-04-17.
  8. "Naegeli syndrome | Genetic and Rare Diseases Information Center (GARD) – an NCATS Program". Archived from the original on 2018-04-18. Retrieved 2018-04-17.
  9. synd/1417 at Who Named It?

External links

External resources