Phacomatosis pigmentokeratotica Q84.2

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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History
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Happle al. 1996

Definition
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Sporadically occurring, binary genodermatosis (Karia DR et al. 2018), which is characterized by the joint occurrence of a nevus spilus (papulosus) with a nevus sebaceus(mosaic dermatosis). A malignant degeneration of both hamartomas has been described (Martínez-Menchón T et al. 2005).

Etiopathogenesis
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Actuating mutations in the KRAS or HRAS genes can be detected (Ohm A eet al. 2017). S.a. uner Rasopathies.

Note(s)
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Today, this genodermatosis is considered a variant of the Schimmelpennig syndrome. The associated organ changes correspond to those of the Schimmelpenning-Feuerstein-Mims Syndrome.

Literature
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  1. Karia DR et al (2018) Phacomatosis pigmentokeratotica: A very rare twin spotting phenomenon. Indian J Dermatol Venereol Leprol 84:120.
  2. Martínez-Menchón T et al (2005) Phacomatosis pigmentokeratotica: a 20-year follow-up with malignant degeneration of both nevus components. Pediatric dermatol 22:44-47.
  3. Om A et al (2017)Phacomatosis Pigmentokeratotica: A Mosaic RASopathy with Malignant Potential. Pediatric Dermatol 34:352-355.

Disclaimer

Please ask your physician for a reliable diagnosis. This website is only meant as a reference.

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Last updated on: 29.10.2020