Deafness, Autosomal Dominant 70, also known as dfna70, is related to contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a and autosomal dominant nonsyndromic deafness. An important gene associated with Deafness, Autosomal Dominant 70 is MCM2 (Minichromosome Maintenance Complex Component 2). Affiliated tissues include brain, and related phenotypes are progressive sensorineural hearing impairment and abnormal vestibular function