Short answer · Medically reviewed summary · Last updated: 2026-05-08
Meckel syndrome, also known as Meckel-Gruber syndrome, is a rare, lethal ciliopathy characterized by a classic triad of occipital encephalocele, large polycystic kidneys, and postaxial polydactyly. Symptoms are typically identified prenatally via ultrasound, as the condition severely impacts fetal development and organ function. What are the primary clinical features of Meckel syndrome? The diagnosis of Meckel syndrome is often based on the presence of at least two of the three cardinal features.
1 people with Meckel Syndrome have shared their first-person experience on this question at DiseaseMaps.
Which are the symptoms of Meckel Syndrome?
Symptoms of Meckel Syndrome reported by real patients, from the most common to the most limiting, plus a medically reviewed summary with sources.
Meckel syndrome, also known as Meckel-Gruber syndrome, is a rare, lethal ciliopathy characterized by a classic triad of occipital encephalocele, large polycystic kidneys, and postaxial polydactyly. Symptoms are typically identified prenatally via ultrasound, as the condition severely impacts fetal development and organ function.
What are the primary clinical features of Meckel syndrome?
The diagnosis of Meckel syndrome is often based on the presence of at least two of the three cardinal features. Because Meckel syndrome disrupts primary cilia function, it results in widespread developmental abnormalities. Common clinical findings include:
- Occipital encephalocele: A sac-like protrusion of the brain and the membranes that cover it through an opening in the skull.
- Renal cystic dysplasia: Enlarged, multicystic kidneys that are non-functional.
- Postaxial polydactyly: The presence of extra fingers or toes on the ulnar or fibular side of the limbs.
- Hepatic developmental anomalies: Including ductal plate malformation and liver fibrosis.
How does Meckel syndrome affect development and daily life?
In the 34 individuals represented within the DiseaseMaps community, the impact of Meckel syndrome is profound and life-limiting. Beyond the primary triad, patients often present with pulmonary hypoplasia—underdeveloped lungs—resulting from the lack of amniotic fluid (oligohydramnios) caused by renal failure. This lack of fluid also leads to "Potter sequence," characterized by distinct facial features and limb deformities. Due to the severity of these organ system failures, Meckel syndrome is unfortunately considered a lethal condition, with most pregnancies resulting in stillbirth or neonatal death shortly after delivery.
When should families seek specialized medical guidance?
Families with a history of Meckel syndrome should seek genetic counseling immediately, as the condition follows an autosomal recessive inheritance pattern, meaning there is a 25% recurrence risk for each subsequent pregnancy. If a prenatal ultrasound indicates any of the characteristic signs of Meckel syndrome, it is vital to be referred to a maternal-fetal medicine specialist and a clinical geneticist for comprehensive evaluation and supportive care planning.
Next steps
- Consult with a clinical geneticist to discuss carrier testing and recurrence risks.
- Connect with the 34 community members on DiseaseMaps.org to share experiences and find support.
- Request a referral to a high-risk obstetrician if you are currently pregnant and concerned about fetal development.
Medical disclaimer: This information is for educational purposes only and does not substitute professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Meckel syndrome.
- Orphanet: Meckel-Gruber syndrome (ORPHA:565).
- OMIM (Online Mendelian Inheritance in Man): #249000 MECKEL SYNDROME.
Posted Mar 13, 2018 by Ma. Florencia lamas 500
