Fibromuscular Dysplasia (FMD) is a non-inflammatory vasculopathy that can present diverse vascular disturbances with the multifocal variant, characterized by arterial segments of varying length and alternating diameters (string of beads), affecting mainly renal, carotid and vertebral arteries and Kawasaki´s disease (KD) is a necrotizing vasculitis occurring in median and small vessels with well-established diagnostic criteria.