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Encephalocraniocutaneous lipomatosis with a mutation in the NF1 gene.
  1. E Legius,
  2. R Wu,
  3. M Eyssen,
  4. P Marynen,
  5. J P Fryns,
  6. J J Cassiman
  1. Centre for Human Genetics, University of Leuven, Belgium.


    Encephalocraniocutaneous lipomatosis (ECCL) is a congenital hamartomatous disorder characterised by unilateral skin lesions, lipomas, and ipsilateral ophthamological and cerebral malformations. The disorder is thought to represent a localised form of Proteus syndrome. In this report, a child is described with ECCL and a de novo nonsense mutation in exon 29 (S1745X) of the neurofibromatosis type 1 (NF1) gene. Although it is possible that both ECCL and NF1 occur coincidentally in this patient, we favour the hypothesis that in exceptional cases a mutation in the NF1 gene might give rise to severe congenital malformations such as ECCL. Possible pathogenetic mechanisms for these malformations are discussed.

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