Melorheostosis and Osteopoikilosis Clinical and Molecular Description of an Italian Case Series

Maria Gnoli, Eric Lodewijk Staals, Laura Campanacci, Maria Francesca Bedeschi, Flavio Faletra, Salvatore Gallone, Agostino Gaudio, Teresa Mattina, Fiorella Gurrieri, Antonio Percesepe, Iria Neri, Annalucia Virdi, Morena Tremosini, Annamaria Milanesi, Evelise Brizola, Elena Pedrini, Luca Sangiorgi

Research output: Contribution to journalArticlepeer-review


Melorheostosis (MEL) is an uncommon, sclerosing disease, characterised by hyperostosis of long bones, resembling the flowing of candle wax. The disease is sporadic and the pathogenesis is still poorly understood. Occasionally, the same family can include individuals with MEL and Osteopoikilosis (OPK), a disease characterised by multiple round foci of increased bone density. LEMD3 gene mutations are related to OPK and Buschke-Ollendorff Syndrome, a genetic condition in which an association between MEL, OPK and skin lesions is observed. In rare cases, LEMD3 mutations and recently mosaic MAP2K1 gene mutations have been correlated to MEL suggesting that somatic mosaicism could be causative of the disease. In this study, we described the clinical, radiological and molecular findings of 19 individuals with MEL and 8 with OPK and compared the results to the medical literature. The molecular analyses of this case series corroborate the available data in the medical literature, indicating that LEMD3 germline mutations are not a major cause of isolated MEL and reporting five further cases of OPK caused by LEMD3 germline mutations.

Original languageEnglish
Pages (from-to)215-221
Number of pages7
JournalCalcified Tissue International
Issue number2
Early online dateMay 25 2019
Publication statusPublished - Aug 2019


  • LEMD3 gene
  • Melorheostosis
  • Osteopoikilosis
  • Osteopoikilosis with or without melorheostosis


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