Genitopatellar syndrome: Expanding the phenotype and excluding mutations in LMX1B and TBX4

Omar A. Abdul-Rahman, Trang H. La, Andrea Kwan, Silke Schalaubitz, Greg S. Barsh, Gregory M. Enns, Louaime Hudgins

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Genitopatellar syndrome is a newly described disorder characterized by absent/hypoplastic patellae, lower extremity contractures, urogenital anomalies, dysmorphic features, skeletal anomalies, and agenesis of the corpus callosum. More recently, cardiac anomalies and ectodermal dysplasia have been suggested as additional features of this syndrome. We report on two additional patients with genitopatellar syndrome and expand the spectrum of anomalies to include radio-ulnar synostosis. Since there exists significant overlap in the skeletal phenotype between genitopatellar syndrome and both the nail-patella and short patella syndromes, mutation screening of their causative genes, LMX1B and TBX4, was performed. Although there still does not appear to be an identifiable molecular etiology in genitopatellar syndrome, mutations in these two candidate genes have been excluded in our patients. Since both LMX1B and TBX4 are involved in a common molecular pathway, it is likely that the causative gene of genitopatellar syndrome functions within the same developmental process.

Original languageEnglish (US)
Pages (from-to)1567-1572
Number of pages6
JournalAmerican Journal of Medical Genetics, Part A
Volume140
Issue number14
DOIs
StatePublished - Jul 15 2006
Externally publishedYes

Keywords

  • Absent patellae
  • Genitopatellar syndrome
  • LMX1B
  • Radio-ulnar synostosis
  • TBX4

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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