Hopeful Horizons

The journey of a child with intellectual disabilities

Lei Lei was a hard worker but something in her brain just wasn’t clicking. So I guess this is where the diagnosis of cerebral dysgenesis comes into play. “A birth defect of the brain” We just assumed it was a learning disability and we would get through it. Well it wasn’t just a learning disability, remember the quiet before the storm I mentioned? Thunder along with many turbulent events were coming.

What is Wiedemann-Steiner Syndrome? Here is what the internet says:

Wiedemann-Steiner syndrome (WSS) is a rare genetic disorder characterized by developmental delay, intellectual disability, short stature, and distinctive facial features. It is caused by mutations in the KMT2A gene, which is essential for regulating the expression of other genes during development. 

Symptoms and features

The clinical presentation of WSS can vary widely, but common characteristics include:

  • Developmental and intellectual delays: Most individuals with WSS experience developmental delays, particularly in motor skills and speech. A majority also have some degree of intellectual disability.
  • Distinctive facial features: These features can become more pronounced with age and include:
    • Thick eyebrows with a lateral flare
    • Long eyelashes
    • Widely spaced eyes (hypertelorism)
    • Narrow and down-slanting eye openings (palpebral fissures)
    • A broad or bulbous nasal tip
    • A thin upper lip
  • Hypertrichosis: Excessive hair growth is a common symptom, particularly on the back and arms. “Hairy elbows” (hypertrichosis cubiti) was once considered a primary feature of the syndrome.
  • Growth and feeding issues: Many infants with WSS have low birth weight and postnatal growth restriction, leading to short stature. Feeding difficulties and constipation are also common during infancy.
  • Muscular and skeletal differences: Low muscle tone (hypotonia) is often present, especially in infancy. Skeletal issues can include vertebral anomalies, small hands and feet, and scoliosis.
  • Behavioral characteristics: Some behavioral and neuropsychiatric differences have been observed, including features of autism spectrum disorder, anxiety, hyperactivity, and aggressive behavior.
  • Other associated anomalies: Additional, less common features can affect other body systems, including:
    • Cardiac abnormalities, such as patent ductus arteriosus
    • Genitourinary anomalies
    • Dental issues, like premature eruption of teeth
    • Endocrine problems, including growth hormone deficiency 

Cause and inheritance

WSS is an autosomal dominant disorder caused by a pathogenic variant in the KMT2A gene. This means only one copy of the altered gene is needed to cause the syndrome. 

  • In most cases, the genetic mutation occurs spontaneously (de novo) in the affected person and is not inherited from their parents.
  • However, an affected parent has a 50% chance of passing the genetic variant on to each child they have. 

Diagnosis and management

  • Diagnosis: The diagnosis of WSS is typically confirmed through genetic testing, often after clinical symptoms suggest the possibility. The variable nature of the syndrome can make clinical diagnosis challenging.
  • Management: Care for individuals with WSS is tailored to their specific needs and requires a multidisciplinary team of specialists. Interventions may include:
    • Therapies for developmental delays, such as speech and occupational therapy
    • Monitoring and treating medical issues like growth hormone deficiency or cardiac anomalies
    • Addressing behavioral challenges
    • Special education support 

Fun Fact: National Rare Disease Day is February 28th, and Wiedemann-Steiner Syndrome day is September 15th.

Wiedemann-Steiner Syndrome was first described by Dr. H-R. Wiedemann in 1989 and later defined as a syndrome by Dr. Carlos Steiner and colleagues in 2000. 

Details of the descriptions:

  • 1989: Dr. Wiedemann published the initial description of the syndrome, reporting a Caucasian boy with a combination of growth deficiency, psychomotor delay, and distinctive facial features. 
  • 2000: Dr. Steiner and colleagues defined the syndrome more formally by describing another patient and comparing their case to Wiedemann’s original description. 

Since these initial reports, the understanding and prevalence of Wiedemann-Steiner Syndrome have grown significantly, with the underlying genetic cause (pathogenic variants in the KMT2A gene) identified in 2012. 

For Lei Lei when tested at the age of 12, the gene deformity was not well known, and was not included in the genetic testing that Dr. Puri did. But in 2021, this genetic mutation appeared. So it took 15 years to find this diagnosis. There is still very little information on how WSS effects those that have it. WSS has different symptoms for each individual that has it. For Lei Lei, she has the short stature, standing at only 4’9″ tall, hairy arms and legs, dental abnormalities, along with the intellectual disabilities.

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Mission: To empower and enhance the lives of adults with autism and other developmental disabilities through job skill development, vocational activities, and community involvement. 

Products: The gallery sells a wide range of products, including handmade art, jewelry, and home decor, often made by its own team members. 

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