Multiple lipomas linked to an RB1 gene mutation in a large pedigree with low penetrance retinoblastoma

Maurizio Genuardi, Martina Klutz, Koen Devriendt, Daniela Caruso, Mario Stirpe, Dietmar R. Lohmann

Research output: Contribution to journalArticle


Hereditary predisposition to lipomas is observed in familial multiple lipomatosis (OMIM 151900) and benign cervical lipomatosis (OMIM 151800) and can also be associated with mutations in the MEN1 and PTEN genes (OMIM 131100 and 153480, respectively). In addition, a recent report indicates that a few patients with hereditary retinoblastoma also have lipomas. Here we report on an extended family segregating a splice site mutation in the RB1 gene. Almost all adult carriers of this mutation had multiple lipomas while penetrance for retinoblastoma was incomplete. In an unrelated pedigree, which was reported previously, the identical mutation was only associated with low-penetrance retinoblastoma but not lipomas. Our data indicate that lipoma predisposition in hereditary retinoblastoma is not associated with specific RB1 gene mutations but is influenced by modifying factors linked to this gene.

Original languageEnglish
Pages (from-to)690-694
Number of pages5
JournalEuropean Journal of Human Genetics
Issue number9
Publication statusPublished - 2001


  • Hereditary tumour predisposition
  • Lipomatosis
  • Multiple lipoma
  • Retinoblastoma
  • Tumour suppressor genes

ASJC Scopus subject areas

  • Genetics(clinical)

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