Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Ehlers-Danlos syndrome, vascular type ?
    ### Response:
    How is Ehlers-Danlos syndrome, vascular type diagnosed? A diagnosis of Ehlers-Danlos syndrome (EDS), vascular type is typically based on the presence of characteristic signs and symptoms. Genetic testing for a change (mutation) in the COL3A1 gene can then be ordered to confirm the diagnosis.
    