Is Acromicric Dysplasia hereditary?

Acromicric dysplasia is a rare genetic condition typically caused by de novo (spontaneous) mutations, meaning it is usually not inherited from a parent. While it is a genetic disorder, the vast majority of cases occur sporadically, though it follows an autosomal dominant inheritance pattern if passed down to future generations.

Is Acromicric dysplasia hereditary?

Acromicric dysplasia is a genetic condition caused by pathogenic variants in the FBN2 gene. While it is technically hereditary—meaning it is caused by changes in an individual's DNA—most documented cases of acromicric dysplasia are not inherited from parents. Instead, they arise as de novo mutations, which are new genetic changes that occur for the first time in the affected individual. Because the condition follows an autosomal dominant pattern, an affected person has a 50% chance of passing the mutation to each of their children.

How is Acromicric dysplasia diagnosed genetically?

Diagnosis of acromicric dysplasia is confirmed through molecular genetic testing, specifically by identifying a pathogenic variant in the FBN2 gene. Clinical geneticists recommend testing when characteristic features—such as severe short stature, short hands and feet, and distinct facial features—are observed. Genetic counseling is vital for families, as it helps explain the 50% recurrence risk for future pregnancies and the low likelihood of recurrence if the parents do not carry the FBN2 mutation.

What are the testing and family planning options?

For families affected by acromicric dysplasia, options include:

• Parental testing: To determine if the mutation is de novo or inherited from a mosaic parent.


• Prenatal diagnosis: Available via chorionic villus sampling (CVS) or amniocentesis for pregnancies at known risk.


• Preimplantation Genetic Testing (PGT): Used during IVF to screen embryos for the specific FBN2 mutation.

Next steps

• Consult a clinical geneticist to discuss molecular testing for acromicric dysplasia.


• Connect with the 3 members living with acromicric dysplasia on DiseaseMaps.org to share experiences.


• Request a referral to a genetic counselor to discuss family planning and reproductive options.

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

References

• NIH Genetic and Rare Diseases Information Center (GARD): Acromicric dysplasia


• Online Mendelian Inheritance in Man (OMIM): #102370 (Acromicric Dysplasia)


• Orphanet: Acromicric dysplasia (ORPHA:1049)