Yes, there are associated disorders with ACH, including neurological abnormalities, ophthalmological conditions, hallux valgus, and dorsal hypertrichosis. In some cases, it may also be part of a more complex disorder. Mutations in the CTNNB1 gene have been linked to pilomatricoma, which can occasionally occur alongside ACH.
Rare families with multiple affected members have also been reported, but the inheritance pattern remains unknown.