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PubMed This is a summary of 22 peer-reviewed journal articles Updated
Nephrology

Standard of Care and Monitoring

At a Glance

Senior-Loken syndrome care combines regular kidney tests, blood-pressure checks, growth and nutrition support, and specialist eye exams. Some eye problems, including retinal swelling, high eye pressure, and cataracts, can be treated, but the underlying retinal damage can progress.

Because Senior-Loken Syndrome (SLS) affects both the kidneys and the eyes, care involves two parallel tracks. While the genetic cause cannot yet be reversed, the goal of “conservative management” is to protect kidney function, support growth, and manage treatable eye complications [1][2].

Important: The treatments listed below are examples of what your child’s team might use based on their specific lab results. They are not a universal checklist, and treatments like vitamins, bicarbonate, or fluid guidelines must only be given under a doctor’s direction, as they can cause harm if used incorrectly.

Protecting the Kidneys

Kidney care focuses on managing Chronic Kidney Disease (CKD). Regular monitoring is your most powerful tool [3].

  • Routine Testing: A normal kidney ultrasound (no cysts) or a normal blood creatinine test does not rule out early disease. Nephrologists monitor urine concentration (specific gravity/osmolality), electrolytes (like sodium and potassium), bicarbonate, and blood pressure, along with eGFR trends [4][5].
  • Blood Pressure Management: High blood pressure (hypertension) puts extra stress on the kidneys. Doctors often recommend Ambulatory Blood Pressure Monitoring (ABPM) to catch “masked” hypertension or high pressure that only happens at night [6][7].
  • Correcting Acidosis: When kidneys can’t filter waste, the blood can become too acidic (metabolic acidosis). Doctors may prescribe bicarbonate to keep levels in a healthy range [8][9].
  • Managing Anemia: Advanced CKD can cause anemia (low red blood cells). Treatment often involves iron supplements or synthetic hormones [10][9].
  • Bone and Mineral Health: CKD disrupts calcium and phosphate balance, leading to weak bones. Your care team may suggest specialized vitamin D or “phosphate binders” [11][12].

Growth and Nutrition

Children with CKD often require more calories to grow but may have a poor appetite.

  • Protein and Energy: Generally, protein is not restricted in children; they need it to grow. The goal is individualized based on their CKD stage [13][14].
  • Growth Hormone: If a child’s growth slows significantly despite good nutrition and managed labs, a doctor may evaluate them for Growth Hormone therapy [15][14].

Specialized Eye Care

While the retinal dystrophy in SLS is progressive, some vision changes are caused by “secondary” issues that are highly treatable [16].

  • Cystoid Macular Edema (CME): This is a buildup of fluid in the center of the retina. It can cause sudden blurring. It is often treatable with eye drops or oral medications like carbonic anhydrase inhibitors (e.g., acetazolamide). Crucially, if an oral medication is recommended, the ophthalmologist must coordinate with the nephrologist, as these drugs can affect blood acidity and increase the risk of kidney stones [17][18].
  • Intraocular Pressure (IOP): High pressure in the eye can cause further damage and can often be managed with glaucoma eye drops [19].
  • Cataracts: Cloudy lenses can be surgically removed. Note that cataract surgery removes the cloudiness of the lens, but it cannot restore photoreceptor cells already lost to retinal dystrophy [18][20].

To catch these, your child needs regular exams including Optical Coherence Tomography (OCT)—a non-invasive “photo” of the retina layers—and possibly Electroretinography (ERG) to measure retina electrical activity [4][21][22].

Common questions in this guide

What kidney tests are used to monitor Senior-Loken syndrome in children?
Monitoring may include eGFR trends, urine concentration, electrolytes such as sodium and potassium, bicarbonate, and blood pressure. A normal kidney ultrasound or creatinine result alone does not rule out early kidney disease, so regular nephrology follow-up remains important.
How can doctors detect hidden high blood pressure in SLS?
Twenty-four-hour ambulatory blood pressure monitoring, or ABPM, can identify high readings that occur outside the clinic, including masked or nighttime hypertension. The results help the care team decide whether blood pressure treatment or closer monitoring is needed.
What eye problems can be treated in Senior-Loken syndrome?
Cystoid macular edema may improve with prescribed eye drops or oral carbonic anhydrase inhibitors, and high eye pressure may be treated with glaucoma drops. Cataract surgery can remove a cloudy lens, but it cannot replace photoreceptor cells already lost from retinal dystrophy.
How are growth and nutrition managed for a child with SLS?
Children with chronic kidney disease may need enough calories to grow, while protein intake is usually individualized rather than routinely restricted. A renal dietitian can help tailor nutrition, and a clinician may evaluate growth hormone therapy if growth remains slow despite adequate nutrition and controlled laboratory problems.
Why should nephrology be involved if my child needs acetazolamide?
Oral acetazolamide and similar medicines can affect blood acidity and increase the risk of kidney stones. The ophthalmologist and nephrologist should coordinate the decision and monitoring, especially when kidney function is reduced.
What changes should caregivers report between visits?
New or worsening thirst, frequent urination, headaches, sudden vision changes, unusual tiredness, poor appetite, or slowed growth should be shared with the child's care team. These changes do not identify a specific problem on their own, but they may signal a need for assessment.
Why is bicarbonate monitored in Senior-Loken syndrome?
Low blood bicarbonate can indicate metabolic acidosis, a complication of reduced kidney filtering. Clinicians may prescribe bicarbonate to keep levels in a healthy range, but the dose and monitoring must be individualized.

Questions For You

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Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Given my child's current eGFR and urine specific gravity, what CKD stage are they in and how often should we repeat these tests?
  2. 2.Has my child had a 24-hour ambulatory blood pressure monitor (ABPM) to check for 'masked' or nighttime high blood pressure?
  3. 3.Does the latest OCT scan show any signs of cystoid macular edema (CME), and if so, how will ophthalmology coordinate treatment with nephrology?
  4. 4.Are my child's growth and weight gain on track for their age, or do we need to consult a renal dietitian?
  5. 5.Is my child's bicarbonate level high enough to prevent metabolic acidosis?

References

References (22)
  1. 1

    [Diagnosis and management of chronic kidney disease in children: Guidelines of the French Society of Pediatric Nephrology].

    Pietrement C, Allain-Launay E, Bacchetta J, et al.

    Archives de pediatrie : organe officiel de la Societe francaise de pediatrie 2016; (23(11)):1191-1200 doi:10.1016/j.arcped.2016.08.029.

    PMID: 27743765
  2. 2

    Estimating Time to ESRD in Children With CKD.

    Furth SL, Pierce C, Hui WF, et al.

    American journal of kidney diseases : the official journal of the National Kidney Foundation 2018; (71(6)):783-792 doi:10.1053/j.ajkd.2017.12.011.

    PMID: 29653769
  3. 3

    Clinical and genetic analyses of a Dutch cohort of 40 patients with a nephronophthisis-related ciliopathy.

    Stokman MF, van der Zwaag B, van de Kar NCAJ, et al.

    Pediatric nephrology (Berlin, Germany) 2018; (33(10)):1701-1712 doi:10.1007/s00467-018-3958-7.

    PMID: 29974258
  4. 4

    SENIOR-LØKEN SYNDROME: A Case Series and Review of the Renoretinal Phenotype and Advances of Molecular Diagnosis.

    Yahalom C, Volovelsky O, Macarov M, et al.

    Retina (Philadelphia, Pa.) 2021; (41(10)):2179-2187 doi:10.1097/IAE.0000000000003138.

    PMID: 33512896
  5. 5

    Autosomal Recessive Adolescent Syndromic Nephronophthisis Caused by a Novel Compound Heterozygous Pathogenic Variant.

    Ajiboye O, Vengoechea JE, Gupta R, Lomashvili K

    The American journal of case reports 2023; (24()):e941413 doi:10.12659/AJCR.941413.

    PMID: 37992003
  6. 6

    Role of hypertension in progression of chronic kidney disease in children.

    Vidi SR

    Current opinion in pediatrics 2018; (30(2)):247-251 doi:10.1097/MOP.0000000000000595.

    PMID: 29517980
  7. 7

    Is Blood Pressure Improving in Children With Chronic Kidney Disease? A Period Analysis.

    Barletta GM, Pierce C, Mitsnefes M, et al.

    Hypertension (Dallas, Tex. : 1979) 2018; (71(3)):444-450 doi:10.1161/HYPERTENSIONAHA.117.09649.

    PMID: 29295853
  8. 8

    Metabolic acidosis is common and associates with disease progression in children with chronic kidney disease.

    Harambat J, Kunzmann K, Azukaitis K, et al.

    Kidney international 2017; (92(6)):1507-1514 doi:10.1016/j.kint.2017.05.006.

    PMID: 28729033
  9. 9

    Pilot pragmatic clinical trial of iron therapy in children with anemia of chronic kidney disease (FeTCh-CKD).

    Baqai K, Hootman K, Noziere A, et al.

    Pediatric nephrology (Berlin, Germany) 2026; (41(2)):465-473 doi:10.1007/s00467-025-06903-1.

    PMID: 40736650
  10. 10

    Anemia in chronic kidney disease.

    Atkinson MA, Warady BA

    Pediatric nephrology (Berlin, Germany) 2018; (33(2)):227-238 doi:10.1007/s00467-017-3663-y.

    PMID: 28412770
  11. 11

    Diagnosis and management of mineral and bone disorders in infants with CKD: clinical practice points from the ESPN CKD-MBD and Dialysis working groups and the Pediatric Renal Nutrition Taskforce.

    Bacchetta J, Schmitt CP, Bakkaloglu SA, et al.

    Pediatric nephrology (Berlin, Germany) 2023; (38(9)):3163-3181 doi:10.1007/s00467-022-05825-6.

    PMID: 36786859
  12. 12

    The dietary management of calcium and phosphate in children with CKD stages 2-5 and on dialysis-clinical practice recommendation from the Pediatric Renal Nutrition Taskforce.

    McAlister L, Pugh P, Greenbaum L, et al.

    Pediatric nephrology (Berlin, Germany) 2020; (35(3)):501-518 doi:10.1007/s00467-019-04370-z.

    PMID: 31667620
  13. 13

    Ten tips on how to optimize nutrition in children with chronic kidney disease or on dialysis.

    Polderman N, Shaw V, Anderson CE, et al.

    Clinical kidney journal 2026; (19(4)):sfag046 doi:10.1093/ckj/sfag046.

    PMID: 41948119
  14. 14

    Clinical practice recommendations for growth hormone treatment in children with chronic kidney disease.

    Drube J, Wan M, Bonthuis M, et al.

    Nature reviews. Nephrology 2019; (15(9)):577-589 doi:10.1038/s41581-019-0161-4.

    PMID: 31197263
  15. 15

    KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update.

    Ikizler TA, Burrowes JD, Byham-Gray LD, et al.

    American journal of kidney diseases : the official journal of the National Kidney Foundation 2020; (76(3 Suppl 1)):S1-S107 doi:10.1053/j.ajkd.2020.05.006.

    PMID: 32829751
  16. 16

    Presumed uremic optic neuropathy in a patient with Senior-Loken syndrome.

    Khan AO

    Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society 2023; (37(4)):310-312 doi:10.4103/sjopt.sjopt_140_23.

    PMID: 38155683
  17. 17

    Protocol for the treatment of cystoid macular edema secondary to retinitis pigmentosa and other inherited retinal dystrophies.

    Català-Mora J, Santamaría Álvarez JF, Kyriakou D, et al.

    Archivos de la Sociedad Espanola de Oftalmologia 2024; (99(2)):67-81 doi:10.1016/j.oftale.2023.11.001.

    PMID: 37940089
  18. 18

    Characterising PRPF31-associated retinal dystrophy: Clinical insights from baseline data in a natural history study.

    Eriksen KO, Eidet JR, Kjellström U, et al.

    Acta ophthalmologica 2026; (104(3)):e317-e328 doi:10.1111/aos.70005.

    PMID: 40977613
  19. 19

    Expanding the Clinical Spectrum of CRB1-Retinopathies: A Novel Genotype-Phenotype Correlation with Macular Dystrophy and Elevated Intraocular Pressure.

    Rodriguez-Martinez AC, Marmoy OR, Prise KL, et al.

    International journal of molecular sciences 2025; (26(7)) doi:10.3390/ijms26072836.

    PMID: 40243434
  20. 20

    Cataract surgery outcomes and complications in retinal dystrophy patients.

    Davies EC, Pineda R

    Canadian journal of ophthalmology. Journal canadien d'ophtalmologie 2017; (52(6)):543-547 doi:10.1016/j.jcjo.2017.04.002.

    PMID: 29217020
  21. 21

    Clinical and Genetic Characteristics of Senior-Loken Syndrome Patients in Korea.

    Song JR, Jung S, Joo K, et al.

    Genes 2025; (16(7)) doi:10.3390/genes16070835.

    PMID: 40725491
  22. 22

    CRB1-Associated Retinal Dystrophies: A Prospective Natural History Study in Anticipation of Future Clinical Trials.

    Nguyen XT, Talib M, van Schooneveld MJ, et al.

    American journal of ophthalmology 2022; (234()):37-48 doi:10.1016/j.ajo.2021.07.021.

    PMID: 34320374

This page provides educational information about Senior-Loken syndrome monitoring and treatment; it does not constitute medical advice. Your child's nephrology and ophthalmology teams should tailor tests, medicines, and nutrition guidance to your child.