Condition Deep-Dives 11 min read·Updated 22 July 2026 Clinician-reviewed

ARPKD — Autosomal Recessive Polycystic Kidney Disease

A UK Consultant Nephrologist on ARPKD — a severe ciliopathy presenting in fetal life or infancy with massively enlarged kidneys and congenital hepatic fibrosis. Modern survival is much improved, but combined kidney–liver disease shapes lifelong follow-up.

  • Clinically Reviewed
  • NHS & NICE Aligned
  • UK Evidence-Based
  • Last Reviewed 22 July 2026

Professor Mohammed Mahdi Althaf

Consultant Nephrologist & Acute Physician

View Credentials

Professor Mohammed Mahdi Althaf

MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN

Consultant Nephrologist & Acute Physician · GMC 7216325

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Direct answer

ARPKD: biallelic PKHD1 mutations. Antenatal/neonatal presentation with enlarged echogenic kidneys, oligohydramnios and pulmonary hypoplasia. Always has congenital hepatic fibrosis. Treat hypertension aggressively, anticipate childhood RRT, and consider combined kidney–liver transplant for portal hypertension.

Key recommendation: Biallelic PKHD1 mutations — autosomal recessive.

Quick answer

✓ Best choices

  • Vegetables, lower-potassium fruit and whole grains
  • Sensible portions of fish, eggs, chicken or tofu
  • Olive oil and unsalted nuts in small amounts

✓ Foods to limit

  • Added salt and ultra-processed foods
  • Phosphate additives in processed meats and ready meals
  • Sugary and energy drinks

Key takeaway

ARPKD: biallelic PKHD1 mutations. Antenatal/neonatal presentation with enlarged echogenic kidneys, oligohydramnios and pulmonary hypoplasia. Always has congenital hepatic fibrosis. Treat hypertension aggressively, anticipate childhood RRT, and consider combined kidney–liver transplant for portal hypertension.

Who should be cautious

People on dialysis, post-transplant, pregnant or breastfeeding, or taking prescription medication — confirm with your renal team before changes.

ARPKD — Autosomal Recessive Polycystic Kidney Disease

Genetics & pathology

Gene

  • PKHD1 (6p12) — encodes fibrocystin/polyductin, a ciliary protein
  • Autosomal recessive; 25% recurrence risk in siblings
  • > 750 pathogenic variants described; two truncating variants → severe perinatal phenotype
  • NHS National Genomic Test Directory R193 — cystic kidney disease panel

Kidney Pathology

  • Symmetrical enlargement (up to 10× normal volume)
  • Fusiform dilation of collecting ducts radiating from medulla to cortex
  • Preserved reniform shape

Liver Pathology

  • Ductal plate malformation
  • Congenital hepatic fibrosis (CHF) — portal-tract fibrosis with bile duct hyperplasia
  • Variable Caroli disease (intrahepatic bile duct dilation)
  • Predisposes to recurrent ascending cholangitis and portal hypertension

Clinical presentation by age

Antenatal

  • Enlarged echogenic kidneys (often > 95th centile from 18 weeks)
  • Oligohydramnios (poor fetal urine output)
  • Potter sequence — pulmonary hypoplasia, limb contractures, facial features
  • Termination of pregnancy may be offered for severe disease

Neonatal

  • Respiratory failure from pulmonary hypoplasia (~ 30% perinatal mortality)
  • Massively palpable kidneys
  • Severe early hypertension
  • Oliguria, AKI, electrolyte derangement

Childhood

  • Progressive CKD — most reach ESKD between 5–20 years
  • Severe hypertension (often resistant; needs 2–4 agents)
  • Growth failure
  • Cholangitis: fevers, jaundice, raised ALP/GGT
  • Portal hypertension: splenomegaly, varices, hypersplenism (thrombocytopenia)

Adolescent/adult

  • Milder phenotypes increasingly recognised
  • Hepatic complications may dominate over kidney disease in some

Kidney Vitality is a daily multivitamin developed by a UK Consultant Nephrologist using renal nutrition principles. It contains no added potassium, magnesium, phosphorus or iron, and no herbal blends. See the formulation.

Diagnosis

Imaging

  • Ultrasound — enlarged echogenic kidneys, loss of corticomedullary differentiation, tiny radial cysts
  • MRI — confirms cyst distribution and helps differentiate from ADPKD
  • MRCP — essential to assess biliary tree and detect Caroli disease

Genetic Testing

  • PKHD1 sequencing — NHS R193 panel
  • Differential includes ADPKD (in utero presentation rare but possible), HNF1B nephropathy, Meckel-Gruber, Bardet-Biedl

Liver Assessment

  • LFTs, FBC (for hypersplenism), AFP
  • MRCP and transient elastography for fibrosis staging
  • Endoscopy for varices if portal hypertension suspected

Management & UK pathway

Neonatal

  • Ventilation for pulmonary hypoplasia
  • Bilateral nephrectomy occasionally needed for ventilation
  • Peritoneal dialysis access
  • Aggressive BP control

Childhood

  • ACE-i / ARB first-line for BP and proteinuria
  • Add calcium-channel blockers, beta-blockers as needed
  • Nutritional support — high calorie, low salt, often nasogastric/PEG feeding
  • Growth hormone if growth failure with adequate dialysis
  • Treat cholangitis with prolonged IV antibiotics
  • Variceal screening and banding/sclerotherapy as needed

Kidney Replacement Therapy

  • Peritoneal dialysis preferred in infants
  • Haemodialysis in older children
  • Pre-emptive transplant where possible
  • Living-related donor (carriers — heterozygotes are healthy)

COMBINED KIDNEY–LIVER TRANSPLANT:

  • Indicated for severe portal hypertension, recurrent cholangitis, hepatopulmonary syndrome
  • UK supraregional centres (Birmingham, Leeds, Great Ormond Street)
  • 5-year survival > 80% in modern series

Mdt Follow-up

  • Paediatric nephrology + hepatology + transplant surgery
  • Clinical genetics (family planning, PGD)
  • Psychological and educational support

Family

  • 25% sibling recurrence — offer prenatal diagnosis (CVS at 11 weeks) or PGD
  • Heterozygotes (carriers) are healthy — no surveillance needed

Prognosis

  • Perinatal mortality ~ 30%
  • Of survivors past first month: 80% alive at 10 years; 70% at 20 years (modern series)
  • Long-term outcomes shaped by liver disease and transplant access
ADPKD — Deep Dive (PKD1/PKD2, Tolvaptan, TKV)
Related reading: ADPKD — Deep Dive (PKD1/PKD2, Tolvaptan, TKV).

Key practical tips

Designed for quick scanning — what to order, what to avoid, sensible portions, common mistakes.

  • Cook from scratch when you can
  • Read sodium labels (≤ 0.3 g per 100 g is low)
  • Take any concerns to your GP or renal team early

Clinical guidance

TL;DR summary

ARPKD: biallelic PKHD1 mutations. Antenatal/neonatal presentation with enlarged echogenic kidneys, oligohydramnios and pulmonary hypoplasia. Always has congenital hepatic fibrosis. Treat hypertension aggressively, anticipate childhood RRT, and consider combined kidney–liver transplant for portal hypertension.

Key takeaways
  • Biallelic PKHD1 mutations — autosomal recessive.
  • Antenatal: enlarged echogenic kidneys, oligohydramnios.
  • Always involves congenital hepatic fibrosis.
  • Severe early hypertension is the rule.
  • Combined kidney–liver transplant for portal hypertension.
Kidney Diet & Nutrition Considerations

Diet is one of the most powerful tools you have to look after your kidneys. UK renal guidance points to a Mediterranean-style, reduced-salt pattern: plenty of vegetables, lower-potassium fruit, whole grains, sensible protein, beans and pulses in moderation, oily fish and olive oil. Personal targets — for potassium, phosphate, protein and fluid — should be set by your renal team based on your bloods.

Foods to prioritise

  • Vegetables, lower-potassium fruit and whole grains
  • Sensible portions of fish, eggs, chicken or tofu
  • Olive oil and unsalted nuts in small amounts

Foods to limit

  • Added salt and ultra-processed foods
  • Phosphate additives in processed meats and ready meals
  • Sugary and energy drinks

Potassium, phosphate and protein needs vary between individuals — please confirm personal targets with your renal team or dietitian. Browse the Kidney Diet Hub for more guides in this cluster.

Frequently asked questions

What is ARPKD?

Autosomal recessive polycystic kidney disease (ARPKD) is a rare inherited ciliopathy (~1 in 20,000 live births) caused by biallelic mutations in PKHD1 (encoding fibrocystin/polyductin) on chromosome 6p12. Both kidneys show massive symmetrical enlargement with fusiform dilation of the collecting ducts, and the liver invariably has ductal plate malformation causing congenital hepatic fibrosis. It usually presents antenatally or in the neonatal period.

How does ARPKD present?

Antenatal: massively enlarged echogenic kidneys, oligohydramnios, and the 'Potter sequence' (pulmonary hypoplasia, limb deformities). Neonatal: respiratory failure from pulmonary hypoplasia (~ 30% perinatal mortality), hypertension and palpable abdominal masses. Childhood: chronic kidney disease, severe hypertension, recurrent ascending cholangitis, portal hypertension and splenomegaly from congenital hepatic fibrosis.

How is ARPKD diagnosed?

Antenatal ultrasound is suggestive. Postnatal high-resolution ultrasound shows symmetrically enlarged echogenic kidneys with loss of corticomedullary differentiation and tiny radial cysts. Confirm with PKHD1 sequencing via the NHS National Genomic Test Directory (R193 — cystic kidney disease). Liver imaging (MRCP) is essential to assess hepatic fibrosis and biliary disease.

What is the treatment?

Care is supportive and multidisciplinary. Aggressive BP control (ACE-i / ARB), nutritional support, RRT (peritoneal or haemodialysis) often required in childhood, and kidney transplantation when needed. Liver disease drives the need for COMBINED kidney–liver transplantation in patients with severe portal hypertension or recurrent cholangitis. UK supraregional paediatric nephrology and hepatology MDT input is essential.

What foods are good for kidney health?

A Mediterranean-style, mostly plant-based, reduced-salt diet is the most consistent evidence-based pattern for kidney health. Build meals around vegetables, lower-potassium fruit, whole grains, fish, eggs or tofu, beans and pulses in moderation, and olive oil.

Nutritional challenges in kidney disease

Many people living with kidney disease have to limit foods because of potassium, phosphate, diabetes, dialysis, appetite changes or simply the time it takes to cook from scratch every day. That can make it harder to keep daily nutrition balanced — particularly for vitamins and minerals that food alone may not fully cover.

Kidney Vitality is a UK-formulated daily nutritional support product designed by Consultant Nephrologist Professor Mohammed Mahdi Althaf with renal nutrition in mind from the start. It keeps doses moderate, leaves out added potassium, phosphate and magnesium, and avoids megadose vitamin A — sitting alongside a kidney-friendly diet, not replacing it.

Why Kidney Vitality fits this need

Built around UK guidance

Aligned with British Association for Paediatric Nephrology, NHS National Genomic Test Directory R193, KDIGO 2024 evaluation of CKD and UK liver-kidney transplant pathways.

Designed by a UK Consultant Nephrologist

Formulated and reviewed by Professor Mohammed Mahdi Althaf (GMC 7216325).

Multisystem & family-aware

Practical guidance on kidney AND liver disease, combined transplantation and prenatal options.

Designed by a UK Consultant Nephrologist

Ready to support your kidney health?

If you have been researching kidney health, supplements, CKD nutrition or kidney-friendly living, Kidney Vitality was developed specifically around those principles by Professor Mohammed Mahdi Althaf (GMC 7216325). Nephrologist Developed Daily Multivitamin.

  • No Added Potassium
  • No Added Magnesium
  • No Added Phosphorus
  • No Added Iron
  • One capsule daily
  • UK GMP — BRCGS, NSF GMP, Halal
Subscribe & Save — £20.39/monthCheck your current multivitamin

✓ Free UK tracked delivery  ·  ✓ Delivered every 30 days  ·  ✓ Pause or cancel anytime  ·  ✓ Never run out

ComparisonKidney VitalityTypical high-street multivitamin
Added potassiumNoneOften included
Added phosphateNoneOften included (E338–E452)
Vitamin A (retinol)No megadoseOften high-dose retinol
Kidney-focused formulationYesNo — general population
Consultant Nephrologist involvementYes (GMC 7216325)No
UK GMP manufacturedYes (BRCGS, NSF GMP)Varies

Food supplement. Not a medicine and not a treatment for kidney disease. Speak with your GP, pharmacist or renal team before starting any new supplement, especially in advanced CKD, on dialysis, post-transplant, pregnant or breastfeeding.

Clinical reviewer

Professor Mohammed Mahdi Althaf

Consultant Nephrologist

Acute Physician

GMC 7216325

View Full Biography

Professor Mohammed Mahdi Althaf is a UK Consultant Nephrologist and Acute Physician with a special interest in chronic kidney disease, AKI prevention and renal nutrition. He combines hospital practice with patient education and clinical guidance review.

View professional profile →
View Credentials
  • MD
  • MSc
  • PgDip (Clin Ed)
  • FRCP
  • FHEA
  • FASN

About this article

Written for UK patients and based on:

  • NICE guidance
  • NHS resources
  • British Dietetic Association guidance
  • Kidney Care UK resources
View methodology

Each article is researched against current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO and KDOQI international guidelines, and the British Dietetic Association Renal Nutrition Group. Drafts are written by the Kidney Vitality editorial team and reviewed by a UK Consultant Nephrologist before publication. Content is reviewed on a rolling basis and updated when guidance changes.

Editorial standards

  • Clinically reviewed
  • NHS-aligned
  • NICE-aligned
  • Evidence-based
  • Reviewed before publication
View full editorial process

Every article is researched and written by the Kidney Vitality editorial team using current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO/KDOQI international guidelines, and British Dietetic Association renal nutrition guidance. Drafts are reviewed for clinical accuracy by Professor Mohammed Mahdi Althaf, MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN (Consultant Nephrologist & Acute Physician, GMC 7216325) before publication. Content is updated when UK guidance changes.

References (4)View Sources
  1. NICE NG203: Chronic kidney disease — assessment and management
  2. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of CKD
  3. KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update
  4. British Dietetic Association — Renal Nutrition Group

Medical disclaimer

This content is educational only and does not replace personalised medical advice.

Read full disclaimer

This page is general information, not personal medical advice. If you have chronic kidney disease, are on dialysis, have had a kidney transplant, are pregnant or breastfeeding, or take prescription medication, please confirm any supplement with your GP, pharmacist or renal team before starting.

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