Bohring‑Opitz syndrome is a rare genetic disorder caused by a new mutation in the ASXL1 gene. It brings together many complex challenges.
Children tend to have distinctive facial features, joint stiffness in their arms, and a small head size.
They often struggle with feeding, growth, breathing, sleep apnea, and frequent lung infections. Some also face intellectual delays, seizures, or even rare tumors.
The day remembers how parents and advocates created a worldwide support group to guide each other through shared worries and joys.
Awareness efforts bring families together and highlight the need for better care and equal access. People use special graphics in blue, gold, denim, and ribbons to draw attention.
Support networks help carers find resources. Foundations fund registries, biobanks, and gene studies to uncover how the syndrome works and boost chances for future treatments.
Advocates push for fair healthcare, inclusive policies, and culturally aware medical care for all affected families.
Bohring-Opitz Syndrome Day Timeline
First Clinical Description of Bohring‑Opitz Syndrome
German geneticist Axel Bohring and colleagues publish the first clinical description of the syndrome, defining its distinctive facial features, posture, and severe developmental profile.
ASXL1 Identified as the Causal Gene
Using exome sequencing, Hoischen and collaborators at Radboud University Medical Center show that de novo truncating mutations in the ASXL1 gene cause Bohring‑Opitz syndrome.
Clinical Criteria for Bohring‑Opitz Syndrome Refined
Hastings and colleagues publish refined clinical diagnostic criteria, helping distinguish Bohring‑Opitz syndrome from similar conditions and guiding clinicians before genetic testing becomes routine.
First Clinical Management Series on ASXL1‑Positive Patients
A detailed case series on nine individuals with ASXL1 mutations outlines common complications and proposes practical management strategies for feeding, respiratory problems, seizures, and tumor risk.
Comprehensive GeneReviews Chapter on Bohring‑Opitz Syndrome
GeneReviews publishes a dedicated chapter synthesizing genetic, clinical, and management knowledge, becoming a key reference for clinicians caring for people with Bohring‑Opitz syndrome.
Large Cohort Study of 39 Individuals with Bohring‑Opitz Syndrome
A multicenter study analyzes 39 affected people, expanding the known clinical spectrum, clarifying frequencies of major features, and reinforcing recommendations for tumor surveillance.
Updated Tumor Screening Guidelines Including Hepatoblastoma
Experts and advocacy groups publish revised guidelines that extend abdominal ultrasound screening to both kidneys and liver and consider alpha‑fetoprotein testing to detect Wilms tumor and hepatoblastoma early.
How to Observe Bohring-Opitz Syndrome Day
Here are a few creative, heartfelt ways people can join in and bring more attention to Bohring-Opitz Syndrome Day.
Wear Something Meaningful
Choose a bold piece of clothing in blue or gold. These colors show support and help spark fresh conversations.
Add a denim pin or ribbon. It doesn’t have to be fancy—just visible. Friends might ask what it means, giving you a chance to share facts.
Share a Story
Use social media to post a short message, photo, or video. Focus on a family’s daily wins or challenges. You could also link to helpful resources. Personal stories move people.
They often open the door for deeper understanding and lasting support.
Host a Fundraiser
Plan a small bake sale, quiz night, or game stream. It doesn’t need a big budget. All proceeds can go toward research, support programs, or awareness materials.
Even a tiny donation helps grow community resources and fuel scientific progress.
Connect With Others
Join an online group or event focused on rare conditions. Leave a kind comment or attend a live chat. Many families feel isolated.
Hearing from others—whether they have the syndrome or just care deeply—can be a big comfort.
Learn Something New
Watch a short video or read a blog post from a medical expert or caregiver. Understanding leads to better conversations. You’ll become a stronger ally simply by learning how to talk about it. Curiosity is one of the easiest ways to make change happen.
History of Bohring-Opitz Syndrome Day
Bohring-Opitz Syndrome Day began with one mother’s search for connection. In 2011, Sünne van Gemert-Godbersen started a Facebook group after her daughter received a rare diagnosis.
At the time, very little information was available, and few families had heard the name.
The group quickly became a safe place to share updates, photos, and advice. It brought together families across countries, languages, and time zones.
In 2015, the first official awareness day was launched. Taylor Gurganus, whose son also has the condition, helped lead the effort. She worked with other parents to mark the day each year.
They chose the date the support group was created to honor the community’s beginning. Gold and denim became the theme.
Gold represents the strength and light in these children’s lives. Denim connects with the wider rare disease movement.
Now, the day has reached far beyond a small group online. Each year, more people learn about the condition, share stories, and support new research.
Families no longer feel so alone. The day gives them space to speak, reflect, and find others who understand.
With each message shared or ribbon worn, the voices grow louder. Bohring-Opitz Syndrome Day continues to build strength through community and awareness.
Facts About Bohring-Opitz Syndrome Day
Chromatin Regulator Behind the Syndrome
Bohring-Opitz syndrome is caused by truncating variants in the ASXL1 gene, which encodes a chromatin-binding protein that interacts with polycomb and trithorax group complexes to influence how tightly DNA is packaged and which developmental genes are expressed.
Human and experimental studies show that ASXL1 plays a key role in epigenetic regulation and HOX gene control during embryogenesis, and that loss-of-function variants disturb these programs in multiple tissues.
An Ultra-Rare Condition Documented in Only Dozens of Cases
Clinical reviews and registry data describe Bohring-Opitz syndrome as an ultra-rare disorder, with early summaries noting only several dozen individuals worldwide and Orphanet classifying its prevalence as below 1 in 1,000,000 people.
More recent cohorts built from exome sequencing and international case sharing still report relatively small numbers, suggesting that many affected individuals remain undiagnosed or unreported despite improved genetic testing.
Almost Always a New (De Novo) ASXL1 Variant
Although Bohring-Opitz syndrome results from a single pathogenic variant in one copy of ASXL1, most affected individuals have a de novo change that is not present in routine blood testing of either parent.
GeneReviews and cohort reports describe only rare families in which a parent is mosaic for the ASXL1 variant, which can lead to more than one affected child, so recurrence risk counseling often hinges on carefully assessing parental mosaicism.
A Distinctive Limb Posture as a Diagnostic Clue
One of the most recognizable clinical signs of Bohring-Opitz syndrome is a characteristic upper-limb posture featuring internally rotated shoulders, flexed elbows, and wrists and fingers held in ulnar deviation.
Early case series documented this pattern, now often called the “BOS posture,” in nearly all infants with the condition, and GeneReviews still highlights it as a major clue that can prompt targeted ASXL1 testing in children with otherwise unexplained developmental and medical problems.
Early Mortality and a Broadening Outcome Spectrum
Published series on Bohring-Opitz syndrome describe substantial medical fragility, with early reports noting deaths in roughly one quarter of known patients, often related to severe infections, respiratory disease, or cardiac complications.
As more children are followed longitudinally, clinicians are documenting a wider outcome range, including survival into later childhood and adolescence, while still emphasizing that most survivors have profound developmental impairment and complex ongoing medical needs.
Wilms Tumor Risk and Kidney Ultrasound Surveillance
Bohring-Opitz syndrome confers an increased risk of Wilms tumor, a childhood kidney cancer, with one aggregated series identifying this tumor in about 6 percent of individuals with truncating ASXL1 variants.
Based on these findings, GeneReviews and expert guidelines recommend periodic renal ultrasound in early childhood, typically every three months, to detect Wilms tumors at a smaller, more treatable stage, even though precise lifetime cancer risk remains uncertain.
Somatic ASXL1 Mutations Link Developmental Biology and Leukemia
The same gene that is disrupted in germline form in Bohring-Opitz syndrome, ASXL1, is also one of the most frequently mutated genes in certain blood cancers when altered somatically.
Studies of myelodysplastic syndromes, acute myeloid leukemia, and age-related clonal hematopoiesis show recurrent truncating ASXL1 mutations that affect chromatin regulation and transcription, illustrating how a single epigenetic regulator can be involved both in congenital neurodevelopmental disease and in acquired malignancies.
