Which of the following is False regarding fibromuscular dysplasia ?

Fibromuscular dysplasia (FMD) Abnormal development or growth of cells in the walls of aeries that can cause the vessels to narrow or bulge. Most common form- Medial fibrosis Young women and affects the distal 2/3 of the main renal aery. Bilateral. The iliac aeries are the limb aeries most likely to be affected by fibromuscular dysplasia. Gross: Alternating thickened and thinned aerial walls give rise to the characteristic "sausage-string" or "string of beads" appearance (especially as seen on angiography) Histology: fibromuscular thickening of the media alternating with areas of thinning and loss of the internal elastic lamina.