Short answer · Medically reviewed summary · Last updated: 2026-05-08
TL;DR: Cherubism is a rare, autosomal dominant genetic condition caused primarily by mutations in the SH3BP2 gene, which lead to abnormal bone remodeling in the jaw. These genetic changes disrupt the normal balance of bone-forming and bone-resorbing cells, resulting in the characteristic fibrous growths associated with Cherubism. What causes Cherubism at the genetic level? The primary cause of Cherubism is a mutation in the SH3BP2 gene located on chromosome 4p16.3.
Which are the causes of Cherubism?
Causes of Cherubism explained: genetic and environmental factors, reviewed against medical sources, plus patient perspectives.
TL;DR: Cherubism is a rare, autosomal dominant genetic condition caused primarily by mutations in the SH3BP2 gene, which lead to abnormal bone remodeling in the jaw. These genetic changes disrupt the normal balance of bone-forming and bone-resorbing cells, resulting in the characteristic fibrous growths associated with Cherubism.
What causes Cherubism at the genetic level?
The primary cause of Cherubism is a mutation in the SH3BP2 gene located on chromosome 4p16.3. This gene provides instructions for making a protein that plays a critical role in the signaling pathways of immune cells, specifically macrophages and osteoclasts (cells that break down bone). In individuals with Cherubism, the mutated protein is overactive, causing these cells to become hyper-responsive. This leads to an excessive, localized inflammatory response in the jawbone, replacing healthy bone tissue with fibrous, cyst-like masses.
Is Cherubism hereditary?
Yes, Cherubism follows an autosomal dominant inheritance pattern. This means that an individual only needs to inherit one copy of the mutated SH3BP2 gene from one affected parent to develop the condition. However, it is important to note that not everyone with the mutation will show the same clinical severity; penetrance can be variable. In some cases, Cherubism may occur due to a "de novo" (new) mutation in a child with no family history of the condition.
What are the known triggers and risk factors?
While the root cause is genetic, researchers are still investigating why the condition specifically targets the mandible and maxilla. Current understanding includes:
- Genetic Mutation: Approximately 70–80% of individuals with clinical Cherubism test positive for an SH3BP2 mutation.
- Age of Onset: Symptoms typically emerge in early childhood, usually between ages 2 and 7, as the jaw is undergoing active growth.
- Hormonal Influence: It is hypothesized that fluctuating hormones during puberty may influence the progression or stabilization of the bone lesions.
What does current research say about the etiology of Cherubism?
Current research into Cherubism is focused on understanding the "gain-of-function" mechanism of the SH3BP2 protein. Scientists are exploring how this protein affects the interaction between the immune system and bone development. Because Cherubism is rare, ongoing studies aim to determine why the jaw is uniquely susceptible compared to other bones in the body.
Next steps
- Consult a clinical geneticist to discuss SH3BP2 mutation testing.
- Schedule regular evaluations with a maxillofacial surgeon to monitor jaw growth.
- Connect with the 2 members of the DiseaseMaps.org community who are living with Cherubism to share experiences.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Cherubism.
- Online Mendelian Inheritance in Man (OMIM): #118400 Cherubism.
- Orphanet: ORPHA1668 - Cherubism.
- PubMed: "SH3BP2 gene mutations in Cherubism" (Clinical Literature Review).
