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Case report
Senior-Løken syndrome misdiagnosed as nephrosclerosis related to hypertensive disorders of pregnancy
  1. Yuri Hirai,
  2. Aya Mizumoto,
  3. Kensuke Mitsumoto and
  4. Takashi Uzu
  1. Nephrology and Blood Purification, Nippon Life Hospital, Osaka, Japan
  1. Correspondence to Dr Takashi Uzu; takuzu{at}


A 31-year-old woman with retinitis pigmentosa who had been diagnosed with renal failure due to nephrosclerosis related to hypertensive disorders of pregnancy was referred to our hospital to prepare for renal replacement therapy. Ultrasonography and MRI of the kidneys revealed multiple corticomedullary cysts. A renal biopsy showed that the tubules were tortuous and atrophic with segmented tubular basement membrane thickening. These findings indicated that she had Senior-Løken syndrome. A molecular genetic analysis was performed, and homozygous deletion of the gene encoding nephronophthisis-1 was found. Thus, the clinical diagnosis of Senior-Løken syndrome was genetically confirmed. Because her renal function was gradually worsening, she was scheduled to undergo living donor kidney transplantation. Senior-Løken syndrome, which is recognised as a very rare paediatric inherited disease characterised by nephronophthisis and eye problems, can cause adult-onset end-stage renal failure.

  • chronic renal failure
  • retina

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  • Contributors Patient was under the care of YH, AM and TU and supervised by KM. Report was written by YH and TU.

  • 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.

  • Patient consent for publication Obtained.

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