Which are the symptoms of Weaver Syndrome?

Weaver Syndrome is a rare overgrowth disorder characterized by accelerated physical growth, advanced bone age, and distinct craniofacial features. Symptoms typically manifest in early childhood, with most patients exhibiting macrocephaly, a broad forehead, and a characteristic "downward-slanting" eyelid appearance.

What are the primary clinical features of Weaver Syndrome?

The hallmark of Weaver Syndrome is prenatal and postnatal overgrowth. Patients often present with a rapid growth rate during the first few years of life. Common clinical observations include:

• Craniofacial features: Broad forehead, hypertelorism (widely spaced eyes), and a small, pointed chin (micrognathia).


• Skeletal findings: Advanced bone age, camptodactyly (permanently bent fingers), and broad thumbs or toes.


• Neurological/Developmental: Mild to moderate intellectual disability and delayed motor milestones are frequently reported.


• Hypertonia: Many children with Weaver Syndrome exhibit increased muscle tone in infancy.

How does Weaver Syndrome impact quality of life?

While the physical overgrowth in Weaver Syndrome often stabilizes after puberty, the impact on daily life varies significantly. Many individuals face challenges with fine motor skills due to joint contractures or hand abnormalities. Furthermore, the distinct facial features and developmental delays may necessitate early intervention services, including physical, occupational, and speech therapy to support integration and independence.

When should families seek medical attention?

Beyond routine monitoring by pediatric specialists, families should seek immediate medical attention if a child with Weaver Syndrome experiences sudden changes in neurological status, such as new-onset seizures, unexplained severe headaches, or significant regression in developmental milestones. Because Weaver Syndrome is associated with a slightly increased risk of certain tumors, any unusual masses or persistent, localized pain should be investigated promptly by an oncologist or geneticist.

How do symptoms evolve over time?

The overgrowth associated with Weaver Syndrome is most pronounced in early childhood. As the child reaches adolescence, the growth velocity often slows, and the height percentile may stabilize. While the craniofacial characteristics of Weaver Syndrome remain, the developmental trajectory is unique to each individual; consistent multidisciplinary care is essential to managing the evolving needs of the patient.

Next steps

• Consult a clinical geneticist to confirm a EZH2 gene mutation diagnosis.


• Connect with the DiseaseMaps.org community to share experiences with the 6 members currently living with this condition.


• Schedule regular screenings with a pediatric endocrinologist and orthopedic specialist.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Weaver Syndrome overview.


• Orphanet: Rare disease database entry for Weaver Syndrome (ORPHA:904).


• OMIM (Online Mendelian Inheritance in Man): #277590 Weaver Syndrome.


• PubMed: Clinical studies on EZH2-related overgrowth syndromes.