There are various types of FMD, with multi-focal fibroplasia being the most common. Further, less common, forms of the disease include focal (previously known as intimal) and adventitial fibroplasia.[1][2][3][4] FMD predominantly affects middle-aged women, but has been found in men and people of all ages.[1] Pediatric cases of FMD are vastly different from that of the adult population, and poorly studied. The prevalence of FMD is not known and, although the disease was initially thought to be rare, recent studies have suggested that it may be underdiagnosed.[5]