Minor trauma can lead to extensive bruising. Spontaneous arterial rupture has a peak incidence in the third or fourth decade of life, but may occur earlier. Midsize arteries are commonly involved. Arterial rupture is the most common cause of sudden death. Acute diffuse or localized abdominal or flank pain is a common presentation of arterial or intestinal rupture.
Life expectancy is shortened with a majority of individuals living only into their forties.
Joint hypermobility is usually limited to the digits. Tendon and muscle rupture can occur. This type of EDS is inherited in an autosomal dominant manner. The muscular hypotonia can be very pronounced and leads to delayed gross motor development. Individuals with the Kyphoscoliosis Type present with scoliosis at birth that is progressive.