Eligibility CriteriaMale patients with the classic form of Fabry disease, aged 18-50.
Normal male volunteers of the same approximate age will be included as a control.
No patients or volunteers with hypertension, hypercholesterolemia, diabetes, peripheral vascular disease, coagulopathy, or any other disease predisposing to vasculitis or Raynaud's phenomenon.
No volunteers who are taking any kind of medication.
Must be able to give informed consent.