Which histologic findings are characteristic of the medial dysplasia subtype of fibromuscular dysplasia (FMD)?

Updated: Jul 27, 2018
  • Author: James A Wilson, MD, MSc, FRCPC; Chief Editor: Helmi L Lutsep, MD  more...
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This accounts for 80% of renal cases and most carotid cases.

Regions of thick, fibrodysplastic, collagenized tunica media alternate with regions of thinned media.

The result is the classic string-of-beads appearance on angiography.

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