LZTR1-related spinal schwannomatosis and 7q11.23 duplication syndrome: A complex phenotype with dual diagnosis

Karthik Muthusamy, Maciej M. Mrugala, Bernard R. Bendok, Radhika Dhamija

Research output: Contribution to journalArticlepeer-review


Background: Dual diagnoses in genetics practice are not uncommon and patients with dual diagnosis often present with complex and challenging phenotypes. A combination of meticulous phenotyping and molecular genetic techniques are essential in solving these diagnostic odysseys. Methods: Clinical features and genetic workup of a patient presenting with incidental schwannomatosis. Results: A 19-year-old male presented with incidental painless schwannomatosis in the background of macrocephaly, distinctive facies, and learning disability. Comprehensive genetic testing with gene panel and chromosomal microarray led to a dual diagnosis of LZTR1-related schwannomatosis and 7q11.23 duplication syndrome. Conclusion: We emphasize the need for high index of suspicion and comprehensive genetic testing in complex phenotypes. Interrogation of the interplay between the pathogenic variants in multiple genes could improve our understanding of the pathophysiologic pathways and contribute to therapeutic discoveries.

Original languageEnglish (US)
Article numbere1560
JournalMolecular Genetics and Genomic Medicine
Issue number1
StatePublished - Jan 2021


  • 7q11.23 duplication syndrome
  • LZRT1
  • Schwannomatosis
  • dual diagnoses
  • pain

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)


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