The genetic syndrome of bushy eyebrows is Cornelia de Lange syndrome (CdLS).
Cornelia de Lange syndrome (CdLS) is the most well known genetic syndrome and disorder that is associated with very bushy and often thick or highly arched eyebrows, which also frequently meet in the middle.
This is a trait called synophrys.
Cornelia de Lange Syndrome (CdLS) is a rare, multisystem genetic disorder that affects physical and cognitive development.
In Cornelia de Lange Syndrome (CdLS), the eyebrows are highly arched as well as thick and often meet in the center.
The key features in Cornelia de Lange Syndrome (CdLS) are growth restriction (short stature), small head or microcephaly, long eyelashes, limb and hand abnormalities, intellectual disabilities, and developmental or behavioral challenges.
There's also a few other rare genetic syndromes that also share the distinct facial feature of bushy eyebrows which include.
Sanfilippo Syndrome (Mucopolysaccharidosis Type III) and Wiedemann-Steiner Syndrome (WDSTS).
Sanfilippo Syndrome (Mucopolysaccharidosis Type III) is a rare and inherited metabolic disorder that results in the buildup of complex sugars in your body's cells and progressively damages your brain and your nervous system.
The key features in Sanfilippo Syndrome (Mucopolysaccharidosis Type III) are prominent and bushy and thick eyebrows that also become more pronounced as the child ages.
People with Sanfilippo Syndrome (Mucopolysaccharidosis Type III) also may have a large head, coarse facial features, developmental delay, sleep issues and behavioral challenges.
Wiedemann-Steiner Syndrome (WDSTS) is a very rare, autosomal dominant genetic disorder that is caused by mutations in the KMT2A gene.
The key features of Wiedemann-Steiner Syndrome (WDSTS) are having thick eyebrows, joined eyebrows also known as synophrys, long eyelashes, widely spaced eyes, delayed growth, intellectual disability and excessive body hair also known as hypertrichosis.