Article Text

Download PDFPDF
De novo X-linked Alport syndrome in a 3-year-old girl
  1. Hiroshi Komatsu1,
  2. Takeshi Goda1 and
  3. Kandai Nozu2
  1. 1 Department of Pediatrics, National Hospital Organization Maizuru Medical Center, Maizuru, Kyoto, Japan
  2. 2 Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
  1. Correspondence to Dr Hiroshi Komatsu, hi_coma23519{at}


Alport syndrome (AS) is an inherited kidney disease that may lead to end-stage renal disease in early adult life. It is a clinically and genetically heterogeneous nephropathy. The possibility of a patient with haematuria or proteinuria being diagnosed as having AS cannot be excluded even if the patient is female or if the family history is unknown. We report a 3-year-old girl with a de novo frameshift mutation, c.3906delA p.(Gly1303Aspfs*17), in the COL4A5 gene. The significance of the electron microscopic study on the glomerular basement membrane must be emphasised because it is the first step towards the diagnosis of AS. Genetic analysis provides the only conclusive diagnosis of AS, by determining the mode of inheritance and prognosis.

  • urinary and genital tract disorders
  • proteinurea
  • genetic screening counselling
View Full Text

Statistics from


  • Contributors HK and TG contributed to provide medical care for the patient. KN performed the genetic analysis of COL4A5 in the patient. HK also wrote the manuscript with input from all authors.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.