Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: The Ehlers-Danlos Syndrome (EDS) is a rare connective tissue disorder characterised by fragility of the soft connective tissues and widespread manifestations in skin, ligaments, joints, blood vessels and internal organs. We report a case of a 12-year-old boy, previously diagnosed with kyphoscoliosis-type EDS (type VI), presenting with a left brachial artery pseudo-aneursym with history of multiple spontaneous and post-traumatic arterial ruptures. Surgical management of this patient was performed successfully by primary repair of brachial artery lesion.
A: 
What tissue is most affected in Ehlers-Danlos syndromes?